Question

One angle of an isosceles triangle measures 130°. What measures are possible for the other two angles? Choose all that apply.

75 65 25 50

Answer 1

25°

Explanation:

In an isosceles triangle, 2 angles are equal.

The sum total of all angles in a triangle = 180

Assume unknown angle as x.

As 1 angle is already given, the equation is

130 + x + x = 180

130 + 2x = 180

2x = 50

x = 25°

Answer 2

25

Explanation:

Isosceles triangle has two congruent angles.

∠ + ∠ + 130 = 180

2∠ = 50

∠ = 25