Question

if one of a triangle is equal to half the sum of the other two equal angles, the triangle is :

Answer 1

let A, B, C be 3 angles
A=1/2 (B+C)
B+C=2A
A+B+C=180
A+2A=180
3A=180
A=180/3
A=60
B+C=2A
B+C=2(60)
B+C=120
B=60,C=60
A=60,B=60,C=60
it's an equilateral triangle