## What is a quadrangle with one right angle?

It is called a right quadrilateral.

## What is a polygon with 1 right angle?

Right: A right triangle has one right angle. It may be isosceles or scalene.

**Which quadrilaterals have at least one right angle?**

Name of Quadrilateral | Description |
---|---|

Rectangle | 2 pairs of parallel sides. 4 right angles (90°). Opposite sides are parallel and congruent. All angles are congruent. |

Square | 4 congruent sides. 4 right angles (90°). Opposite sides are parallel. All angles are congruent. |

Trapezoid | Only one pair of opposite sides is parallel. |

**Can you draw a trapezoid with at least 1 right angle?**

A trapezoid can have either 2 right angles, or no right angles at all.

### What has exactly one right angle?

A right triangle has one right angle and two acute angles, or angles that measure less than 90 degrees.

### What does a quadrangle look like?

A quadrangle, or quadrilateral, is a two-dimensional shape with four angles and four sides. A trapezoid is a quadrangle with at least one pair of parallel sides. A kite is a quadrangle with two pairs of adjacent congruent sides. A parallelogram is a quadrangle with two pairs of parallel sides.

**Is a quadrilateral with one right angle a rectangle?**

A parallelogram with one right angle is a rectangle. A quadrilateral whose diagonals are equal and bisect each other is a rectangle.

**Which shape is a trapezoid with only 1 pair of parallel sides?**

A trapezoid is a quadrilateral with exactly one pair of parallel sides. (There may be some confusion about this word depending on which country you’re in. In India and Britain, they say trapezium ; in America, trapezium usually means a quadrilateral with no parallel sides.)

#### Do trapezoids have right angles?

The trapezoid has two right angles.