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 ...

The diagonals meet at right angles so we know we have an angle of \(90^\circ\). The three angles in a triangle add up to \(180^\circ\). So we must have an angle of \(50^\circ\) in the top left ...

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 ...