Mathematics Class 9>Chapter 11 - Triangle and its Angles>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 1

EASY

9th CBSE

IMPORTANT

Earn 100

Define a triangle.

Important Questions on Triangle and its Angles

EASY

9th CBSE

IMPORTANT

Mathematics Class 9>Chapter 11 - Triangle and its Angles>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 2

Write the sum of the angles of an obtuse triangle.

MEDIUM

9th CBSE

IMPORTANT

Mathematics Class 9>Chapter 11 - Triangle and its Angles>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 3

In

△ A B C,

if

∠ B = 60 °, ∠ C = 80 °

and the bisectors of angles

∠ A B C

and

∠ A C B

meet at a point

O

, then find the measure of

∠ B O C

in degrees.

MEDIUM

9th CBSE

IMPORTANT

Mathematics Class 9>Chapter 11 - Triangle and its Angles>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 4

If the angles of a triangle are in the ratio

2 : 1 : 3,

then find the measure of the smallest angle in degrees.

EASY

9th CBSE

IMPORTANT

Mathematics Class 9>Chapter 11 - Triangle and its Angles>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 5

State exterior angle theorem.

EASY

9th CBSE

IMPORTANT

Mathematics Class 9>Chapter 11 - Triangle and its Angles>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 6

The sum of two angles of a triangle is equal to its third angle. Determine the measure of the third angle.

MEDIUM

9th CBSE

IMPORTANT

Mathematics Class 9>Chapter 11 - Triangle and its Angles>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 7

In the following figure, if $A B ∥ C D, E F ∥ B C, ∠ B A C = 65 °$ and $∠ D H F = 35 °,$ find $∠ A G H$ .

Question Image

MEDIUM

9th CBSE

IMPORTANT

Mathematics Class 9>Chapter 11 - Triangle and its Angles>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 8

In the following figure, if $A B ∥ D E$ and $B D ∥ F G$ such that $∠ F G H = 125 °$ and $∠ B = 55 °,$ find $x$ and $y$ .

Question Image

MEDIUM

9th CBSE

IMPORTANT

Mathematics Class 9>Chapter 11 - Triangle and its Angles>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 9

If the angles

∠ A, ∠ B

and

∠ C

of

△ A B C

satisfy the relation

∠ B - ∠ A = ∠ C - ∠ B

, then find the measure of

∠ B

.