# Proofs for Isosceles Trapezoids

Instructions:

question 1 of 3

### What is the length of AC in the given isosceles trapezoid, given that BD = 10 cm?

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### 2. In the given isosceles trapezoid, what is the measure of angle C?

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Isosceles trapezoid proofs are the focus for this combination of a quiz and worksheet. You can find questions on calculating the length of a side, as well as the sum of opposite angles.

## Quiz and Worksheet Goals

Questions in the quiz will address the following material:

• Finding the length of one side, given the length of another side of an isosceles trapezoid
• Determining the measure of an angle in a given trapezoid
• Finding the angle in another trapezoid
• Recognizing the sum of opposite angles

## Skills Practiced

• Defining key concepts - ensure that you know the sum of opposite angles in an isoceles trapezoid
• Information recall - remember what you know about finding the angles in a given trapezoid
• Problem solving - use your skills to solve practice problems involving finding the length of sides in a trapezoid