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CBSE Class 7 Answered

Triangle ABC is isosceles with AB=BC. If angle B is twice the measure of angle A, then find all the angles of the triangle
Asked by nandinigoswami80 | 22 Nov, 2018, 07:11: PM
answered-by-expert Expert Answer
According to the question,
AB = BC
angle A = angle C
Let angle A = angle C = x
Given that 
angle B = 2 angle A = 2x
Angle sum property of a triangle 
x + x + 2x = 180°
4x = 180°
x = 45°
angle A = angle C = x = 45°
angle B = 2 × 45° = 90°
Answered by Sneha shidid | 23 Nov, 2018, 09:51: AM
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