Supplementary Angles

Supplementary angles are pairs of angles whose measures sum to 180 degrees.

Supplementary angles is a middle school-level concept. It is listed in the California State Standards for Grade 6.

Prerequisites

Angle:

An angle is a measure of the amount of rotation about the point of intersection of two lines or line segments that is required to bring one into correspondence with the other.

Classroom Articles on Plane Geometry

	Acute Angle	Hypotenuse
	Altitude	Midpoint
	Area	Obtuse Angle
	Circle	Parallel
	Circumference	Perimeter
	Collinear	Perpendicular
	Complementary Angles	Pi
	Diameter	Plane Geometry
	Geometric Construction	Point
	Golden Ratio	Radius
	Golden Rectangle	Triangle Inequality

Classroom Articles on Geometry (Up to Middle School Level)

	Cone	Pentagon
	Congruent	Polygon
	Cube	Prism
	Cylinder	Pyramid
	Decagon	Quadrilateral
	Dodecagon	Rectangle
	Dodecahedron	Regular Polygon
	Equilateral Triangle	Right Triangle
	Hendecagon	Sphere
	Heptagon	Square
	Hexagon	Surface
	Icosahedron	Surface Area
	Isosceles Triangle	Tetrahedron
	Nonagon	Trapezoid
	Octagon	Triangle
	Octahedron	Volume
	Parallelogram