Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. What is a quadrilateral? A quadrilateral is a four-sided shape where each of the sides are straight ...

Angles are often described using three letters. Angles can be drawn and measured using a protractor. Finding angles between lines Complementary angles form a right angle. Supplementary angles form ...

A polygon is simply a shape with three or more sides and angles. Quadrilaterals are 2D shapes ... has two pairs of equal sides. It has four right angles (90°). The opposite sides are parallel.

One quarter of a rotation is 90 degrees. Another word for a 90 degree angle is a right angle. A right angle is created when two lines intersect and are perpendicular to each other. A right angle ...