Preguntas propuestas
4
2015
• Aptitud Académica • Matemática • Cultura General • Ciencias Naturales
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Geometría Relaciones métricas I
4.
Del gráfico, E y R son puntos de tangencia, PH =2( =2( EP) y LR=6. Calcule LP.
NIVEL BÁSICO 1.
L
A) 2 B) 6
Se muestra un cuadrado ABCD cuyo lado mide 1. Halle BE . E
P
E
C) 2 D) 6
B
C
E)
3
R
H
5.
A
D
B) 2
A) 1
C)
3 D) 3 2.
E)
3 2
A) 10 D) 16,9
1 2
Si P, Q y B son puntos de tangencia y PQ=4, calcule AB.
En un triángulo isósceles ABC , de base AC , AB=13 y longitud del circunradio de dicho triángulo.
6.
B) 12,1
C) 14,4 E) 19,6
En el gráfico mostrado, calcule
AB
.
AC
C
A B
O1
B
O2 Q
A
A) 1 P
D) A) 2,5 D) 2,4 3.
B) 3
C) 2 E) 3,5
Según el gráfico, P, Q y R son puntos de tangencia. Si MR=3 2 , calcule AM . P
A) 6
7.
B)
1
C)
2
2 2
E)
1 3
3 3
En el gráfico mostrado, T es es punto de tangencia. Calcule
AD DN
.
T
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Geometría 8.
En el gráfico mostrado, ABCD es un cuadrado. Calcule a+b. B
C M
N
D
C
α
A
β A
A) 30º D) 75º
D
B) 45º
A) 3
B)
C) 2
65
D) 6
C) 60º E) 90º 11.
NIVEL INTERMEDIO 9.
5
B
10
E) 7
En el gráfico, M es es un punto de tangencia. Calcule x.
Del gráfico mostrado, m BE = m DE , AB=a y BC = b. Halle CD (T es es punto de tangencia).
M
A
x
T B
C
A) 60º D) 106º
E 12.
D
C) D)
A P
ab ab a+ b b( a + b)
C) 90º E) 120º
En el gráfico mostrado, CD=3 y PC =4. =4. Calcule ( A y B son puntos de tangencia). CE (
A) a – b B)
B) 75º
E D
C
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Geometría A) 80º
NIVEL AVANZADO
B) 100º C) 85º
13.
En el gráfico, H es punto de tangencia. Si OP=3, calcule PH .
D) 90º E) 120º
15.
O
En el gráfico, FD= DG, AE =4( =4( EC ) y PB=4. Calcule PC .
P D A
H
B θ
F
A) 2 D) 5
B) 3
C
C) 4 E) 6
P
G E
14.
En el gráfico, P y Q son puntos de tangencia. Calcule x. P
θ
A
A) 3 B) 1 x
C) 4 D) 2 Q
E) 3,2
B
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Geometría Relaciones métricas II
4.
Si QR=5 y TR=4, calcule UQ. ( P, Q, R, S y T son son puntos de tangencia).
NIVEL BÁSICO U 1.
P Q
En la figura mostrada, AB=4 cm y BC =5 =5 cm. Calcule la longitud (en cm) de EC . B
T R S
L
A
A)
C
β
β
D) E 5.
D
A) 3
B) 3,25
D) 4 2.
16
B)
9
40
C)
9
80
E)
9
B
S
D) 3 3
C) 2 E)
3
17
En el gráfico, AB=6; BC =5 =5 y DF =4. =4. Calcule EF .
A)
13
D)
19
D
B)
15
S
Z
A
C
E
C)
17
E)
34
Se muestra una circunferencia inscrita en el SAR, AS=5, SR=7 y AR=8. Calcule AZ . triángulo SAR
B
D
C
O
6. 3.
9
R
A 2
30
C) 3,75
Se tiene un triángulo RAB, tal que AB=4, AR=5 y BR=6. Calcule la longitud de la bisectriz interior relativa a AR. B) 3
9
Del gráfico, O es el centro del paralelogramo ABCD, CS=2( BS)=4 y DR=3. Calcule BD.
E) 4,5
A) 2 2
64
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Geometría 7.
En un trapecio ABCD, AD // BC , AD=16, BC =6, =6,
10.
En un triángulo ABC , se traza la altura BH , que
AB=7 y CD=13. Calcule la longitud del seg-
interseca a la circunferencia inscrita en M y y N .
mento que tiene por extremos los puntos me-
Si AB=15, AC =14 =14 y BC =13, =13, halle MN .
dios de las bases. B) 5
A) 5 D) 3 8.
2
C) 2 E)
7
7
2 21
Se muestra un cuadrado ABCD, los cuadrantes y una semicircunferencia de centro O. Si
A) 2
5
B) 3
6
C) 2
15
D) 2
17
E)
4 3
AB= m y MN = n, halle OE ( E es punto medio 11.
de MN ). ).
En un cuadrado ABCD se inscribe una circunferencia, la cual es intersectada en P por el
B
arco
C
BD
con centro en C . ( P más cercano a
B); además, AB=4. Halle OM si M es es el punto
M
medio de CP y O es el centro de la circunferencia.
E
N
A
A)
D)
mn
A) 1
O
B)
2 m2 − n2 2
mn m + n
D
D)
2
C)
m
− n2
2
2 2
C)
2
1 2
E)
E)
PQ=5, TA=8 y TB=2, calcule TQ.
Q
2 mn
En un triángulo ABC , AB=2, BC = 5 y AC = 6 . Halle la longitud de la altura relativa a AC .
2 4
Del gráfico, P, Q y T son son puntos de tangencia. Si
P
NIVEL INTERMEDIO
9.
12.
B)
B
A
T
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Geometría A) 1 B) 2 C) 2 D) 2 2 E) 4
NIVEL AVANZADO 13.
En la figura, M , N , S y T son son puntos de tangencia. AT )2. Si R · r =4, =4, calcule ( BS)2 – ( AT 15.
M N
r S A
14.
R E
T
B P
B
O
A) 4 D) 16
Según el gráfico, E y y F son son puntos de tangencia, EA=a y OF = b. Calcule PH .
B) 8
C) 12 E) 2
A
En el gráfico, MN // AC , AC =9 =9 y BC 2 – AB2=72. Calcule HP. B
2 a
A)
2 a
B) 2 C)
M
N
D) A
H
P
C
2 b
+
E) 2
2 a
− b2
2 b2 2 a
+
2 b
2 b2 − a2 2 2 a
− b2
H
F
O
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Geometría Relaciones métricas III
A) 2 D) 6
NIVEL BÁSICO 1.
Indique el valor de verdad (V) o falsedad (F) de las siguientes proposiciones: I. El teorema de Marlen solo se aplica en el cuadrado y rectángulo. II. El teorema de Ptolomeo puede aplicarse en todo cuadrilátero. III. El teorema de Euler solo se aplica en trapecios. trapecios. A) VVV D) VVF
2.
B) VFV
5.
M
A
N
B
A) mn
C) AB+ BN = BM + BC
2
m + n
C
B) ( AB)( BN )=( )=( BM )( )( BC )
C) m+ n E)
6 3
Si AB // MN , indique la relación correcta entre
A) ( AB)( BC )=( )=( BM )( )( BN )
mn
3
AB, BC , BM y y BN .
C) VFF E) FVV
B) 2 mn
C) 2 E)
Se tiene un cuadrilátero inscriptible ABCD, ( AB)(CD)= m y ( BC )( )( AD)= n. Halle ( AC )( )( BD).
D) 3.
B) 3
( mn)
D) ( AB)2+( BN )2=( BM )2+( BC )2
m + n
E) ( AB)2+( BC )2=( BM )2+( BN )2
En el gráfico mostrado, 3( BC )=4( )=4( AB) y 2(CD)=3( AD). Halle
AE
.
EC
B
6.
El cuadrilátero ABCD es inscriptible, AB=a, BC = b, CD=c y AD= d , halle
CE BD
.
D α
α+2θ
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Geometría 7.
Sea ABCD un cuadrilátero bicéntrico. M , N , P y Q son los puntos de tangencia de la circunferencia inscrita, con AB, BC , CD y AD, respectivamente, tal que ( MN )2+( NP)2+( PQ)2+( MQ)2=32. Halle el inradio del cuadrilátero ABCD. A) 1 D) 2
B) 2
11.
A) 3 D) 6
C) 4 E) 2 2 12.
8.
Se tiene un heptágono regular ABCDEFG. Si AC =a, AD= b y
1 a
1 +
b
1 =
5
Se tiene un triángulo ABC , AB=6, BC =8, =8, ade I y más, mS BIO=90º. Halle AC . ( I y O son incentro y circuncentro del T ABC , respectivamente). B) 4
C) 5 E) 7
Se muestra un rectángulo ABCD, en que CE =6. =6. 2 2 Calcule ( BO) +(OD) .
, calcule la longitud B
C
del lado del heptágono. α
A) 6 D)
B) 5
O
C) 10
1
E)
5
1 10 α
NIVEL INTERMEDIO 9.
A
Si ( AB)2+( AC )2=32, ( AN )2+( MD)2=24, halle la longitud del segmento que tiene por extremos los puntos medios de AC y y MD.
E
D
A) 6 B) 12 C) 24 D) 36 E) 72
C N B M
NIVEL AVANZADO
A
D
13.
Según el gráfico, T y Q son puntos de tangencia, CE =3, =3, BP=5 y AL=4. Calcule x
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Geometría 14.
En un triángulo ABC , AB=a, BC = b y mS ABC =2 =2a, la bisectriz del S ABC interseca a la circunferencia circunscrita en D. Halle BD. A) B) C) D) E)
ab ab
15.
En el gráfico, el triángulo ABC es equilátero, T es punto de tangencia y NL=12. Calcule la longitud del segmento que une los puntos medios de BL y CN .
sena cosa ab
( a + b) cos α
B
A) 4 B) 6 C) 8 D) 2 E) 3
T
N
a+ b 2cos α a+ b 2senα
A
L
C
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Geometría Áreas de regiones triangulares
4.
Se muestran las regiones regulares ABCD y ANU , AB=3. Halle el área de la región ANU .
NIVEL BÁSICO
N 1.
En el gráfico mostrado, AB es diámetro, R=2 y
B
m AT = 30 º. Halle el área de la región sombrea-
C
da (T y y M son son puntos de tangencia).
T
R
A
A
A)
M
4 3
B) 6
C) 6
D) 12 2.
A)
B
E) 12
3
B)
3
En la región interior de una región equilátera
C)
3
+
2
3
+
2
D)
área de dicha región equilátera. A) 6 D) 12
B) 6 3
3
C) 12
E)
E) 36 5.
3.
Si ABCD es un cuadrado cuyo lado mide 12, halle el área de la región BMN (T : punto de tangencia).
U
3 2 3
(
3
+2
)
3
+
2
)
3
se ubica un punto cuyas distancias hacia los lados del equilátero miden 1; 2 y 3. Halle el
D
3 3
( 2
3
(
3
+
2
)
3
Si O es el centro del cuadrado ABCD, AB= m y DL= n, halle el área de la región BOL.
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Geometría 6.
Si las medianas de una región triangular miden 9; 12 y 15, halle el área de dicha región. A) 36
B) 54
9.
C) 72
D) 84
NIVEL INTERMEDIO Indique el valor de verdad (V) o falsedad (F) de las siguientes proposiciones.
E) 96
I. Si dos regiones son congruentes, entonces 7.
sus áreas son iguales.
Si 2( BN )=3( )=3( MN ), ), halle la razón de áreas de
II. Si dos regiones son equivalentes, entonces
las regiones ABM y BMC . ( A, B son puntos de
sus áreas son diferentes.
tangencia).
III. Si dos regiones son isoperimétricas, entonces sus áreas son iguales.
C M A
A) VVV B) VFF
N
C) VFV D) VVF E) FFF
B 10.
En el gráfico mostrado, AB y AO son diámetros, AO=OB=4. Halle el área de la región sombrea-
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Geometría 11.
Se muestra una circunferencia inscrita en el t DNL,
A) 2 D) 3
además, ( AB)( BC )=26. )=26. Halle el área de
5
C) 4 E) 5
B) 4
5
5
la región DNL si a+b=90º. 14.
N
En un triángulo ABC , cuyo ortocentro y circuncentro son H y O, respectivamente, tal que BH = BO, AB=6 y BC =8, =8, calcule el área de la
región ABC . C
A)
β D
B
6 3
B) 2
3
C) 3 3
L
D) 4
α A
15.
3
E) 12
3
Sobre los lados, AB y AC de de un triángulo ABC se ubican los puntos P y Q, respectivamente. Si
A) 6,5
B) 13
C) 13
D) 26
E)
2
AQ=a y AC = b, y PC ∩ BQ={ M }, }, calcule el área
26 2
de la región PMB en función de las áreas de d e las regiones PMQ(S1) y BCM (S2).
12.
Halle el área de una región triangular cuyos lados miden
2;2y
5. A)
S1·a + S2 ·b a+ b
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Geometría Áreas de regiones cuadrangulares
B
C
NIVEL BÁSICO 1.
S3
S2
Del gráfico mostrado, halle la razón de áreas de las regiones ABC y y BCED. A
B
S1 E
D
A) S1 =
A
A) 1
B)
+
S3
2
B) S2
=
S1·S3
C) S2
=
S1 + S3
=
S
C E 1 2
C)
1 3
2
2 D) 2
S2
E)
2 2
D) S 2
S
2 1
+
2
S
S
3
D
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Geometría 5.
Se muestra un cuadrado ABCD en el que
8.
=4 m. Halle el área de la región sombreada. CN =4
En un paralelogramo ABCD se traza la diagonal AC y y se ubica el punto medio M de AD. Si BM ∩ AC ={ ={Q} y el área de la región paralelo-
B
grámica es 60 u2, calcule el área de la región
C
triangular AMQ. A) 4 u2
B) 5 u2
D) 8 u2 N
E) 10 u2
NIVEL INTERMEDIO
A
D 9.
A) 4 m 2
B) 6 m2
D) 16 m2
C) 8 m2 E) 32 m2
Calcule el área de la región sombreada si el T ABC es equilátero y BP=4. ( P es punto de tangencia). B
6.
C) 6 u2
Si ABCD es un rombo, C es es punto de tangencia y DP=10 m, calcule el área de la región ABCD. B
C
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Geometría 11.
Calcule la razón de áreas de la región cuadrada ADIN y y la región DIPL. ( L y P son puntos de tangencia) D
A) S3=S1+S2 B) S2=S3+S1 C) (S2)2=(S1)2+(S3)2
I
D) (S3)2=(S1)(S2)
A) 2 B) C) D) E) 12.
E)
3
S3
=
S2
S1
+
2 14.
4 L
3
P
16
En el gráfico, calcule el área de la región sombreada ABCD si O es punto medio de AC y PC = 2 5 − 2 3 u.
15 25
A
B
N
C
12
Se sabe que P es punto de tangencia, y S1 y S x son áreas de las regiones sombreadas. Calcule 2 S x si S1=10 m . ( ARQP es un cuadrado).
O
Q R
A
S x
C
B S1
A) 3 u2 D) 8 u2
P
B) 4 u2
D
C) 2 E)
3
4 3
u2 2
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Anual UNI
RELACIONES MÉTRICAS I
RELACIONES MÉTRICAS II