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UNIVERSIDAD NACIONAL AGRARIA DE LA SELVA
Centro Preuniversitario. Mayo - Agosto 2021
Semana 1 – Segmentos
Curso: Geometría Docente: José O. Castillo Cornelio
Tingo María 2021
1. En una línea recta se ubican los puntos
consecutivos A, B y C, tal que 2(AC) =
3(AB) y BC = 7. Calcule AC.
a) 1 2 b) 15 c) 18 d) 21 e) 16
2. Si AD = 36, calcula “a”.
a) 5 b) 12 c) 4 d) 9 e) 10
3. Se tienen los puntos colineales y consecu-
tivos A, B, C y D; tales que: AD = 18, BD =
13 y AC = 12. Calcula “BC”.
a) 3 b) 4 c) 5 d) 6 e) 7
4. Sobre una recta se ubican los puntos
consecutivos A, B, C y D. Calcular “CD”,
si: AD = 20 y se cumple:
5
CD
3
BC
2
AB
=
=
a) 12 b) 9 c) 6 d) 10 e) 8
5. En una línea recta se ubican los puntos
consecutivos A, B y C, tal que 2(AC) =
3(AB) y BC = 7. Calcule AC.
a) 12 b) 15 c) 18 d) 21 e) 16
6. Dado los puntos colineales y consecutivos
A, B, C, D y E, donde AC = BD y AD + BE
= 21. Hallar BD si C es punto medio de
AE.
a) 7 b) 8 c) 9 d) 12 e) 14
7. Sobre una recta se toman los puntos
consecutivos A, E, B, P y C; E es punto
medio de AB y P es punto medio de EC.
Calcular PC si 𝐴𝐵 + 2(𝐵𝐶) = 42.
a) 10 b) 12.5 c) 10.5 d) 14 e) 21
8. Sobre una recta se ubican los puntos
consecutivos A, B, C, D y E, tal que:
AC = CE, AB + CD = 18 y DE – BC = 4.
Calcule CD.
a) 6 b) 7 c) 8 d) 10 e) 14
9. Sean los puntos colineales y consecutivos
A, B, C, D y E, tal que AB + CD = 3(BC) y
DE = AB. Si luego se ubica el punto medio
M de BE, donde MD = 4 y AE = 17. Cal-
cular CM.
a) 2 b) 3 c) 3.5 d) 4 e) 4.5
10. Dados los puntos colineales y consecuti-
vos A, B, C, D y E tales que, B es punto
medio de AC, C es punto medio de AD y D
punto medio de CE. Hallar la medida del
segmento que resulta al unir los puntos
medios de BC y DE si AE = 42.
a) 21 b) 24 c) 24.5 d) 26 e) 28
11. Dado los puntos colineales y consecutivos
A, B, C, D y E, donde AC=BD y
AD+BE=21. Hallar BD si C es punto medio
de AE
.a) 7 b) 8 c) 9 d) 12 e) 14
12. Se marca los puntos colineales de una
recta: A, B, C, D, E, tales que:
DE
BC
BD
AC
3
1
, =
= y
36
2
3
=
+ DE
AB . Hallar AE.
a) 44 b) 54 c) 48 d) 68 e) 34
13. Se marcan los puntos colineales y conse-
cutivos A, B, M, C, siendo M punto medio
de BC. Hallar:
2
2
2
2
BM
AM
AC
AB
+
+
.
a) 1 b) 2 c) 8 d) 4 e) 3
a - b a + b
A C
B
a
D
Tingo María 2020
14. Sobre una recta se ubican los puntos
colineales A, B, C y D de tal manera que
16
;
12 =
=
+ BD
BC
AB y
24
=
AD . Hallar BC.
a) 1 b) 10 c) 8 d) 4 e) 7
15. Sobre una línea recta se consideran los
puntos consecutivos A, B, C, D y cumple la
siguiente relación:
m
CD
BD
AB 4
.
2
.
4 =
−
− . Si
m
AB 3
= y m
AC 5
= . Hallar la lon-
gitud del segmento AD.
a) 2m b) 15m c) 3m d) 7m e) 10
16. Sobre una línea recta se consideran los
puntos consecutivos A, B, C, D. Si
m
CD
m
AB 1
;
3 =
= . Hallar la longitud
del segmento que tiene por extremos los
puntos medios de AC y BD.
a) 2m b) 3m c) 5m d) 9m e) 11m
17. Se tienen los puntos colineales A, B, y C;
se toman los puntos medios M y N de AC y
AB respectivamente. Hallar BC. Si: MN=3u
a) 6u b) 4u c) 5u d) 3u e) 2u
18. Sobre una recta se ubican los puntos
consecutivos A, B, C y D. Calcular AC, si
se cumple que:
CD
BC
AD
AB
= y además:
9
4
AD
1
AB
1
=
+
a) 4.5 b) 3.5 c) 6 d) 7.5 e) 5
19. Se tiene los puntos consecutivos A, B, C y
D. Calcular la suma de los segmentos AB
y CD, si el segmento AC es igual a 25 cm,
el segmento BD es igual a 31 cm y el
segmento BC es igual a la diferencia de
los segmentos BD y AC.
a) 40 b) 28 c) 36 d) 50 e) 44
20. Sobre una recta se ubican tres puntos
consecutivos A, B y C donde se cumple:
AB = 3(BC) + 2 y AC = 38 cm. Calcular la
medida del segmento BC.
a) 6 b) 7 c) 8 d) 9 e) 10
21. En una línea recta se tienen los puntos
consecutivos A, B, C y D. Si AD=19.4,
BD=13.6 y AC=12, calcular BC.
a) 5 b) 5.8 c) 6 d) 6.2 e) 6.8
22. Sean los puntos colineales y consecutivos
M, N, R y T, tales que: MR(NR) = 11 y
NR = RT. Calcular:
5
MN
MT 2
2
−
a) 7.2 b) 8 c) 8.8 d) 10 e) 12.2
23. Sobre una regla AE de un metro de longi-
tud se colocan las marcas B, C y D, de tal
manera que: AB + CE = 80 cm y AE – DE
= 70 cm. Calcular: BE – CD
a) 40 cm b) 50 cm c) 60 cm
d) 70 cm e) 30 cm
24. Si dividimos un segmento en tres partes,
cuyas medidas son directamente propor-
cionales a 1/3, 1/4 y 1/2, se obtienen
segmentos donde el segundo mide 12 cm.
Hallar la suma del segundo y tercer seg-
mento.
a) 16 cm b) 26 cm c) 36 cm
d) 37 cm e) 20 cm
25. En una línea recta se toman los puntos
consecutivos A, B, C D y E, tal que B es
punto medio de AC y D es punto medio de
BE. Si AE mide 54 u y contiene 9 veces a
BC ¿A qué distancia de A está D?
a) 21 b) 27 c) 30 d) 32 e) 36
26.Sobre una recta se tienen los puntos con-
secutivos A, B, C D y E. Calcular BE, si se
cumple que AC = 3(CD), B es punto medio
de AD y:
2
2
AD
AE DE 289u
4
 + =
a) 13 b) 17 c) 34 d) 6.5 e) 26

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Geometría

  • 1. UNIVERSIDAD NACIONAL AGRARIA DE LA SELVA Centro Preuniversitario. Mayo - Agosto 2021 Semana 1 – Segmentos Curso: Geometría Docente: José O. Castillo Cornelio Tingo María 2021 1. En una línea recta se ubican los puntos consecutivos A, B y C, tal que 2(AC) = 3(AB) y BC = 7. Calcule AC. a) 1 2 b) 15 c) 18 d) 21 e) 16 2. Si AD = 36, calcula “a”. a) 5 b) 12 c) 4 d) 9 e) 10 3. Se tienen los puntos colineales y consecu- tivos A, B, C y D; tales que: AD = 18, BD = 13 y AC = 12. Calcula “BC”. a) 3 b) 4 c) 5 d) 6 e) 7 4. Sobre una recta se ubican los puntos consecutivos A, B, C y D. Calcular “CD”, si: AD = 20 y se cumple: 5 CD 3 BC 2 AB = = a) 12 b) 9 c) 6 d) 10 e) 8 5. En una línea recta se ubican los puntos consecutivos A, B y C, tal que 2(AC) = 3(AB) y BC = 7. Calcule AC. a) 12 b) 15 c) 18 d) 21 e) 16 6. Dado los puntos colineales y consecutivos A, B, C, D y E, donde AC = BD y AD + BE = 21. Hallar BD si C es punto medio de AE. a) 7 b) 8 c) 9 d) 12 e) 14 7. Sobre una recta se toman los puntos consecutivos A, E, B, P y C; E es punto medio de AB y P es punto medio de EC. Calcular PC si 𝐴𝐵 + 2(𝐵𝐶) = 42. a) 10 b) 12.5 c) 10.5 d) 14 e) 21 8. Sobre una recta se ubican los puntos consecutivos A, B, C, D y E, tal que: AC = CE, AB + CD = 18 y DE – BC = 4. Calcule CD. a) 6 b) 7 c) 8 d) 10 e) 14 9. Sean los puntos colineales y consecutivos A, B, C, D y E, tal que AB + CD = 3(BC) y DE = AB. Si luego se ubica el punto medio M de BE, donde MD = 4 y AE = 17. Cal- cular CM. a) 2 b) 3 c) 3.5 d) 4 e) 4.5 10. Dados los puntos colineales y consecuti- vos A, B, C, D y E tales que, B es punto medio de AC, C es punto medio de AD y D punto medio de CE. Hallar la medida del segmento que resulta al unir los puntos medios de BC y DE si AE = 42. a) 21 b) 24 c) 24.5 d) 26 e) 28 11. Dado los puntos colineales y consecutivos A, B, C, D y E, donde AC=BD y AD+BE=21. Hallar BD si C es punto medio de AE .a) 7 b) 8 c) 9 d) 12 e) 14 12. Se marca los puntos colineales de una recta: A, B, C, D, E, tales que: DE BC BD AC 3 1 , = = y 36 2 3 = + DE AB . Hallar AE. a) 44 b) 54 c) 48 d) 68 e) 34 13. Se marcan los puntos colineales y conse- cutivos A, B, M, C, siendo M punto medio de BC. Hallar: 2 2 2 2 BM AM AC AB + + . a) 1 b) 2 c) 8 d) 4 e) 3 a - b a + b A C B a D
  • 2. Tingo María 2020 14. Sobre una recta se ubican los puntos colineales A, B, C y D de tal manera que 16 ; 12 = = + BD BC AB y 24 = AD . Hallar BC. a) 1 b) 10 c) 8 d) 4 e) 7 15. Sobre una línea recta se consideran los puntos consecutivos A, B, C, D y cumple la siguiente relación: m CD BD AB 4 . 2 . 4 = − − . Si m AB 3 = y m AC 5 = . Hallar la lon- gitud del segmento AD. a) 2m b) 15m c) 3m d) 7m e) 10 16. Sobre una línea recta se consideran los puntos consecutivos A, B, C, D. Si m CD m AB 1 ; 3 = = . Hallar la longitud del segmento que tiene por extremos los puntos medios de AC y BD. a) 2m b) 3m c) 5m d) 9m e) 11m 17. Se tienen los puntos colineales A, B, y C; se toman los puntos medios M y N de AC y AB respectivamente. Hallar BC. Si: MN=3u a) 6u b) 4u c) 5u d) 3u e) 2u 18. Sobre una recta se ubican los puntos consecutivos A, B, C y D. Calcular AC, si se cumple que: CD BC AD AB = y además: 9 4 AD 1 AB 1 = + a) 4.5 b) 3.5 c) 6 d) 7.5 e) 5 19. Se tiene los puntos consecutivos A, B, C y D. Calcular la suma de los segmentos AB y CD, si el segmento AC es igual a 25 cm, el segmento BD es igual a 31 cm y el segmento BC es igual a la diferencia de los segmentos BD y AC. a) 40 b) 28 c) 36 d) 50 e) 44 20. Sobre una recta se ubican tres puntos consecutivos A, B y C donde se cumple: AB = 3(BC) + 2 y AC = 38 cm. Calcular la medida del segmento BC. a) 6 b) 7 c) 8 d) 9 e) 10 21. En una línea recta se tienen los puntos consecutivos A, B, C y D. Si AD=19.4, BD=13.6 y AC=12, calcular BC. a) 5 b) 5.8 c) 6 d) 6.2 e) 6.8 22. Sean los puntos colineales y consecutivos M, N, R y T, tales que: MR(NR) = 11 y NR = RT. Calcular: 5 MN MT 2 2 − a) 7.2 b) 8 c) 8.8 d) 10 e) 12.2 23. Sobre una regla AE de un metro de longi- tud se colocan las marcas B, C y D, de tal manera que: AB + CE = 80 cm y AE – DE = 70 cm. Calcular: BE – CD a) 40 cm b) 50 cm c) 60 cm d) 70 cm e) 30 cm 24. Si dividimos un segmento en tres partes, cuyas medidas son directamente propor- cionales a 1/3, 1/4 y 1/2, se obtienen segmentos donde el segundo mide 12 cm. Hallar la suma del segundo y tercer seg- mento. a) 16 cm b) 26 cm c) 36 cm d) 37 cm e) 20 cm 25. En una línea recta se toman los puntos consecutivos A, B, C D y E, tal que B es punto medio de AC y D es punto medio de BE. Si AE mide 54 u y contiene 9 veces a BC ¿A qué distancia de A está D? a) 21 b) 27 c) 30 d) 32 e) 36 26.Sobre una recta se tienen los puntos con- secutivos A, B, C D y E. Calcular BE, si se cumple que AC = 3(CD), B es punto medio de AD y: 2 2 AD AE DE 289u 4  + = a) 13 b) 17 c) 34 d) 6.5 e) 26