Question

one of the angles of a triangle is 58° and the other two angles are equal. find the measure of each of the equal angles.

Answer 1

let the angles be x
then,
58 + 2x =180(sum of all angles in a triangle is 180)
2x= 180-58=122
x=122÷2=61

Answer 2

let angle a=58°
let angle b and c=x
by angle sum property
a + b + c = 180°
58°+ x + x = 180°
2x = 180°-58°
2x=122°
x=122°/2
x=61°
so angle a = b = 61°