Question

If two angles of a triangle are 55 degree and 80 degree find the third angle

Answer 1

Hey.

As sum of all three interior angels of a triangle is always 180°.

So, The third angel will be

180° -(55°+80°) = 180° - 135° = 45°


Hence, the third angel will be 45°.

Thanks.

Answer 2

sum of all angles of triangle is 180°
let third angle to be x
so
55°+80°+x=180°
x=180°-55°-80°
x=45°