Question

Determine the measure of the unknown angle in the triangle.

Answer 1

65°

Explanation:

Let the unknown angle be ∠ABC

∠ABC + 78° + 37° = 180° (angle sum property of a triangle)

∠ABC + 115° = 180°

∠ABC = 180° - 115°

∠ABC = 65°

∴the unknown angle in the triangle is 65°

Answer 2

you add 78 plus 37 then subtract from 180