EASY
9th ICSE
IMPORTANT
Earn 100

The vertical angle of an isosceles triangle is 90°. If each of its base angles is k° then find the value of k.

50% studentsanswered this correctly

Important Questions on Triangles

MEDIUM
9th ICSE
IMPORTANT
ICSE Mathematics>Chapter 8 - Triangles>Exercise>Q 2
Prove that each angle of an equilateral triangle is 60°. Hence show that every equilateral triangle is equiangular. What is the measure of each of exterior angle of an equilateral triangle?
EASY
9th ICSE
IMPORTANT
ICSE Mathematics>Chapter 8 - Triangles>Exercise>Q 3
Prove that if the base of an isosceles triangle is produced at both ends, the exterior angles so formed are equal to each other.
EASY
9th ICSE
IMPORTANT
ICSE Mathematics>Chapter 8 - Triangles>Exercise>Q 4
In a △ABC, AD bisects ∠BAC and AD=DC. If ∠BDA=70°, calculate ∠ACD and ∠ABD.
EASY
9th ICSE
IMPORTANT
ICSE Mathematics>Chapter 8 - Triangles>Exercise>Q 5

What are the measures of the angles of an isosceles triangle in which each of the base angle is double the vertical angle.

EASY
9th ICSE
IMPORTANT
ICSE Mathematics>Chapter 8 - Triangles>Exercise>Q 5

What are the measures of the angles of an isosceles triangle in which each of the base angle is thrice the vertical angle.

MEDIUM
9th ICSE
IMPORTANT
ICSE Mathematics>Chapter 8 - Triangles>Exercise>Q 6

Find the lettered angle in the below figure:

      Question Image

MEDIUM
9th ICSE
IMPORTANT
ICSE Mathematics>Chapter 8 - Triangles>Exercise>Q 6

Find the lettered angle in the following figure:

    Question Image

MEDIUM
9th ICSE
IMPORTANT
ICSE Mathematics>Chapter 8 - Triangles>Exercise>Q 6

Find the lettered angle in the following figure:

Question Image