Illustration showing two positive angles; angle 1 being the acute angle and angle 2 being the reflex…

Illustration showing four angles that can be used to define different relationships, such as adjacent,…

Illustration showing four angles that can be used to define different relationships, such as adjacent,…

Illustration showing six angles that can be used to define different relationships, such as adjacent,…

Illustration showing angles 1 and 2 are supplementary and angles ACD and DCB are supplementary. Also,…

Illustration used to show "If one acute angle of a right triangle is double the other, the hypotenuse…