Acute angle- An angle less then 90 degrees but more then 0 degrees.

Obtuse angle- an angle between 90 and 180 degrees.

Straight angle- an angle of 180 degrees.

Right angle-an angle of 90 degrees, like the corner of a square.

Quadrilateral-having 4 sides.

Square-a rectangle with all 4 sides the equel length.

Rectangle- a parallelogram having 4 right angles.

Rhombus- a romboheadron or a shape with 4 equal sides.

Trapezoid- having 2 parallel lines and 2 non parallel lines.

Parallelogram- having both sides parallel to each other.

www.math-play.com/geometry-math-games.html

we used google.com