The base angle of an isosceles triangle is thirteen more than three times the vertex angle. What is the difference between the vertex angle and the base angle?

Triangle FGH has equal lengths for FG and GH; what is the measure of ∠F, if ∠G measures 40 degrees?

In triangle ABC, Angle A = x degrees, Angle B = 2x degrees, and Angle C = 3x+30 degrees. How many degrees is Angle B?

An isosceles triangle has a base angle that is six more than three times the vertex angle. What is the base angle?

A particular acute isosceles triangle has an internal angle measuring . Which of the following must be the other two angles?

Points A and B lie on a circle centered at Z, where central angle <AZB measures 140°. What is the measure of angle <ZAB?

In an isosceles triangle the base angle is five less than twice the vertex angle. What is the sum of the vertex angle and the base angle?

The vertex angle of an isosceles triangle is . What is the base angle?

Sides and in this triangle are equal. What is the measure of ?