# Geometry

### by:Cole Derek

Acute angle:It is less than a 90 degree angle.

Obtuse angle:It is more than a 90 degree angle but less than 180 degree angle.

Strait angle:It is 180 degree angle.

Right angle:It has a 90 degree angle but it is in a corner.

Quadrolateral shape:It has four sides.

Square:A plane figure with four equal strait sides.

Rectangle: A plane figure with four strait sides.

Rhombus: A parallelogram opesite equal acute angles.

Trapezoid:A quadrolateral shape with only one pare of parallel sides.

Parallelogram:A shape with four sides and opposite sides that are parallel.

These are games that teach you about geometry

http://www.xpmath.com/forums/arcade.php?do=play&gameid=84

http://www.coolmath.com/reference/geometry-trigonometry-reference.html