Area

Area is a measure of the amount of material that would be needed to "cover" a surface completely.

Area is an elementary-school-level concept. It is listed in the California State Standards for Grade 3.

Prerequisites

Arc length is the length along a curve if it were to be straightened out.

Classroom Articles on Plane Geometry

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

Classroom Articles on Geometry (Up to Elementary-School Level)

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