Question

An isosceles triangle has an angle that measures 100°. What measures are possible for the

other two angles? Choose all that apply.
15°
55°
40°
75°

Answer 1

C. 40

Explanation:

180 - 100 = 80

80/2 = 40

Answer 2

Since the sum of the angles in a triangle = 180º, the 100º angle must be the vertex angle. Since the base angles of an isosceles triangle = each other, each base angle = 40º.

I hope this helps!