Dynamic Activity

Perimeter, Circumference, and Area

Lesson Vocabulary

• perimeter
• area

Take note Key Concept: Perimeter, Circumference, and Area

Square

side length s

P = 4 s p equals 4 s

A = s 2 eh equals , s squared

Triangle

side lengths a, b, and c, base b, and height h

P = a + b + c p equals eh plus b plus c

A = 1 2 b h eh equals , 1 half , b h

Rectangle

base b and height h

P = 2 b + 2 h , p equals 2 b plus 2 h comma  or 2 ( b + h ) 2 open b plus h close

A = b h eh equals b h

Circle

radius r and diameter d

C = π d , or  C = 2 π r A = π r 2 table with 2 rows and 2 columns , row1 column 1 , c , column 2 equals pi d comma or c equals 2 pi r , row2 column 1 , eh , column 2 equals pi , r squared , end table