EduSahara™ Worksheet

EduSahara™ Assignment

Name : Triangle Concepts

Chapter : Triangles

Grade : ICSE Grade IX

License : Non Commercial Use

Question 1

1.

The altitude corresponding to the side
OP

(i)

OR
(ii)

PS
(iii)

NQ
(iv)

NO
(v)

NR

Question 2

2.

The altitude corresponding to the side
PN

(i)

PS
(ii)

NR
(iii)

NQ
(iv)

OR
(v)

NO

Question 3

3.

The altitude corresponding to the side
DE

(i)

DG
(ii)

DE
(iii)

DH
(iv)

EH
(v)

FI

Question 4

4.

The median corresponding to the side
DE

(i)

DG
(ii)

CD
(iii)

EH
(iv)

CF
(v)

CG

Question 5

5.

The median corresponding to the side
PN

(i)

OR
(ii)

NR
(iii)

NO
(iv)

NQ
(v)

PS

Question 6

6.

The median corresponding to the side
NO

(i)

NO
(ii)

NQ
(iii)

PS
(iv)

OR
(v)

NR

Question 7

7.

The exterior angles of the triangle are

(i)

∠DCA , ∠EAB , ∠FBC
(ii)

∠DEB , ∠EBC , ∠FCE
(iii)

∠FEC , ∠GCD , ∠HDE
(iv)

∠EDB , ∠FBC , ∠GCD
(v)

∠CDA , ∠DAB , ∠EBD

Question 8

8.

The vertex opposite to the side
MN

(i)

NO
(ii)

P
(iii)

L
(iv)

M

Question 9

9.

The vertex opposite to the side
LJ

(i)

K
(ii)

LM
(iii)

N
(iv)

J

Question 10

10.

The side opposite to the vertex
R

(i)

ST
(ii)

TR
(iii)

RS
(iv)

US
(v)

RV

Question 11

11.

The side opposite to the vertex
K

(i)

KL
(ii)

MK
(iii)

LJ
(iv)

JN
(v)

JK

Question 12

12.

The side opposite to the vertex
C

(i)

AB
(ii)

AE
(iii)

DB
(iv)

BC
(v)

CA

Question 13

13.

The vertex opposite to the side
NO

(i)

N
(ii)

P
(iii)

PQ
(iv)

O

Question 14

14.

The sides of the triangle are

(i)

NO

,

OM

,

MN
(ii)

LN

,

NK

,

KL
(iii)

MO

,

OL

,

LM
(iv)

LM

,

MK

,

KL
(v)

MN

,

NL

,

LM

Question 15

15.

The name of the triangle is

(i)

△LMO
(ii)

△MNO
(iii)

△LMN
(iv)

△NOP
(v)

△MNP

Question 16

16.

The angles of the triangle are

(i)

∠J , ∠K , ∠L
(ii)

∠I , ∠J , ∠K
(iii)

∠I , ∠J , ∠L
(iv)

∠J , ∠K , ∠M
(v)

∠K , ∠L , ∠M

Question 17

17.

The vertices of the triangle are

(i)

J , K , L
(ii)

L , M , N
(iii)

K , L , M
(iv)

K , L , N
(v)

J , K , M

Question 18

18.

The point of intersection of the altitudes of a triangle is called

(i)

median
(ii)

orthocentre
(iii)

circumcentre
(iv)

centroid
(v)

incentre

Question 19

19.

The point of intersection of the perpendicular bisectors of the sides of a triangle is called

(i)

orthocentre
(ii)

circumcentre
(iii)

altitude
(iv)

median
(v)

centroid

Question 20

20.

The point of intersection of the bisectors of the interior angles of a triangle is called

(i)

median
(ii)

centroid
(iii)

incentre
(iv)

excentre
(v)

circumcentre

Question 21

21.

The point of intersection of the bisectors of the interior angle and the two exterior opposite angles of a triangle is called

(i)

incentre
(ii)

altitude
(iii)

orthocentre
(iv)

circumcentre
(v)

excentre

Question 22

22.

The point of intersection of the medians of a triangle is called

(i)

median
(ii)

orthocentre
(iii)

altitude
(iv)

centroid
(v)

incentre

Question 23

23.

The line joining each vertex to the mid-point of the opposite side of a triangle is called

(i)

excentre
(ii)

incentre
(iii)

circumcentre
(iv)

altitude
(v)

median

Question 24

24.

The perpendicular drawn from each vertex to the opposite side of a triangle is called

(i)

circumcentre
(ii)

incentre
(iii)

median
(iv)

excentre
(v)

altitude

Question 25

25.

Which of the following may lie outside or on the triangle?

a)	orthocentre
b)	centroid
c)	incentre
d)	circumcentre
e)	excentre

(i)

{c,d}
(ii)

{b,a,d}
(iii)

{b,a}
(iv)

{a,d,e}
(v)

{b,c,e}

Question 26

26.

Sum of the interior angles in a triangle is

(i)

180°
(ii)

195°
(iii)

185°
(iv)

190°
(v)

210°

Question 27

27.

How many diagonals does a triangle have?

(i)

3
(ii)

4
(iii)

1
(iv)

2
(v)

0

Assignment Key