## Are opposite angles of an isosceles trapezoid equal?

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The base angles (angles formed between non-parallel sides and parallel sides) are equal in an isosceles trapezoid. Diagonals of an isosceles trapezoid are equal in length. The sum of opposite angles in an isosceles trapezoid is 180 degrees.

## Are the opposite angles of an isosceles trapezoid congruent?

Opposite sides of an isosceles trapezoid are the same length (congruent). The angles on either side of the bases are the same size/measure (congruent). The diagonals (not show here) are congruent.

**What is the quadrilateral of isosceles trapezoid?**

An isosceles trapezoid is a trapezoid with congruent base angles and congruent non-parallel sides. A trapezoid is a quadrilateral with only one of its sides parallel….Isosceles Trapezoid.

1. | Isosceles Trapezoid Definition |
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3. | Isosceles Trapezoid Formula |

4. | FAQs on Isosceles Trapezoid |

### What are the opposite angles of a trapezoid?

Answer and Explanation: Yes opposite angles of a trapezoid are supplementary. Supplementary angles of a trapezoid is defined as the sum of two opposite angles is 180… See full answer below.

### What are the angles in an isosceles trapezoid?

An isosceles trapezoid has two congruent legs and one pair of parallel sides. The base angles are congruent to one another, and by same side interior angles, the upper angles are supplementary to the respective base angles, meaning that they are both 180° – (the measure of the base angle).

**Is a trapezoid A quadrilateral?**

A trapezoid is a quadrilateral with one pair of opposite sides parallel. It can have right angles (a right trapezoid), and it can have congruent sides (isosceles), but those are not required.

## Is a trapezoid always a quadrilateral?

Â Trapezoids must have 4 sides, so they must always be quadrilaterals.

## What theorem states that opposite angles of an isosceles trapezoid are?

THEOREM: If a quadrilateral is an isosceles trapezoid, the opposite angles are supplementary. THEOREM: (converse) If a trapezoid has its opposite angles supplementary, it is an isosceles trapezoid.

**Why are the opposite angles of an isosceles trapezoid supplementary?**