An isosceles triangle has an angle that measures 90°. What measures are possible for the other two angles? Choose all that apply.

Since one angle of the isosceles triangle is 90° and an isosceles triangle has at least two equal angles, the other two angles are also equal. Therefore, the other two angles must each measure (180° - 90°)/2 = 45°.

So, the only measure possible for the other two angles is 45° each.

Answer: 45°.

Two of the angles in a triangle measure 71° and 80°. What is the measure of the third angle?