Question

if one of the angle of a triangle has measure 80degree and the other two angles are equal.find these two angles

Answer 1

let the equal angles each be equal to x.
Then,
=)x+x+80=180 (sum of angles of triangle is 180.)
=)2x+80=180
=)2x=100
=)x=50
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Answer 2

sum of interior angles of a triangle is =180
let angle A =80
angle B= angle C=x
80+x+x=180
80+2x=180
2x=180-80
2x=100
x=50

hence other 2 angles are=50