## Definition:

*An Acute angle is smaller than 90 degrees but bigger than 90 degrees.*

## Obtuse angle is a angle between 90-180 degrees.

## A Straight angle is an angle between 180 degrees.

## A Right angle is an angle of 90 degrees.

## A Quadrilateral is a 4 sided object.

## A square is a shape with 4 equal sides and 4 right angles.

Rectangle

## A shape with 4 sides and 4 right angles.

Rhombus

## A parallelogram with equal acute angles.

Trapezoid

## A four-sided shape with one pair of parallel sides.

Parallelogram