Perimeter: Measures the distance around the outside.
Any Polygon: Square: Rectangle:
1. Add up all the sides P =4 X SP =L + L + W + W
P = 4S P = (2 X L) + (2 X W)
P = 2L + 2W
Area: Measures the area inside a figure in square units.
Square:Rectangle: Triangle: Parallelograms:
A = S X S A = L X W A = 1/2 X B X H A = B X H
Circles and Circumference:
All the points on a circle are the same distance from the center.
A Radius goes from the center to an point on the circle.
A Chord has both endpoints on the outside of the circle.
A Diameter is a chord that passess through the center of a circle.
A Central Angle is an angle whose vertex is the center
The Circumference is the distance around a circle
Dig For Shapes: