A right angle is defined as the quantity of angular measure that equates to 1/4 of a circle.

A right angle equals 90 degrees, or radians. (Also, 100 gon)

Angles whose sum total a right angle's measure are said to be "complementary"

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A right angle is defined as the quantity of angular measure that equates to 1/4 of a circle.

A right angle equals 90 degrees, or radians. (Also, 100 gon)

Angles whose sum total a right angle's measure are said to be "complementary"

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