# Geometry for Dummies

### Learn all about shapes and angles!

Acute angle- An angle less than 90 degrees.

Obtuse Angle - An angle sized between 90 an 180 degrees.

Straight angle-180 degree angle.

Right Angle- An 90 degree angle.

Quadrilateral-a shape with four straight sides.

Square-a shape with four even sides.

Rectangle-a shape with two long sides and two short sides that are made of right angles.

Rhombus-a square turned on it's side.

Trapezoid-a quadrilateral with only one set of parallel lines.

parallelogram-a shape with all parallel lines.