Vertex Angle of an Isosceles Triangle


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question 1 of 3

What does 'a' refer to in this drawing?

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1. If angle 'a' is 10°, what is the measurement of angle 'c?'

2. In this drawing of a triangle, which side is the base?

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About This Quiz & Worksheet

Test your understanding of the vertex angle of isosceles triangles with this worksheet and quiz combo. Topics include what 'a' refers to in a drawing and the measurement of an angle in a given equation.

Quiz & Worksheet Goals

The worksheet and quiz will get you to:

  • Identify the base of a triangle
  • Determine how you can remember that an isosceles triangle has two equal sides
  • Calculate the measurement of a vertex angle

Skills Practiced

  • Problem solving - use acquired knowledge to solve vertex angle practice problems
  • Making connections - use understanding of the concept of the sides of a triangle and how they are connected in an isosceles triangle
  • Information recall - access the knowledge you've gained regarding the base of a triangle

Additional Learning

Learn more about triangles from the lesson named Vertex Angle of an Isosceles Triangle. Consider the following study points as a guide:

  • Real-life triangles
  • Example of an isosceles triangle
  • Practice problems