Question

if the one side of triangle is 80 degree . find measure of each angle

Answer 1

let the other side sbe x
80 + x+x=180 (sum of all angles of a triangle)
2x=180-80
2x=100
x=100/2
x=50
..
the measure of other sides is 50 degree

Answer 2

this answer is correct only if the triangle is isosceles.

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Let the measure of each angle be x.

Therefore,

2x + 80`=180

2x=180-80

2x=100

x=100/2

x=50

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Hence the measure of each angle is 50`