Square
6 m
36 m 2
8 ft. by 3 ft.
24 sq. ft.
base = 5 mi.
height = 12 mi.
30 sq. mi.
area of a square
A = s2 or A = s x s
Perimeter of a square
P = 4s
9 km
81 km2
4.2 ft. by 3 ft.
12.6 sq. ft.
base = 7 in.
height = 9 in.
31.5 sq. in.
area of a rectangle
A = LW
Perimeter of a rectangle
P = 2L + 2W
1.9 in.
3.61 sq. in.
90 mm by 30 mm
2,700 mm2
base = 20 units
height = 16 units
160 sq. units
Area of a parallelogram
A = bh
Circumference of a circle
8.5
72.25 dm2
60 cm by 5 cm
300 cm2
base = 30 km
height = 3 km
45 km2
area of a triangle
A = 1/2bh
Area of a circle
16 m
256 m2
21 yards by 18 yards
378 sq. yd.
base = 6 ft.
height = 4 ft.
12 sq. ft.
area of a trapezoid
A = 1/2 h (b1 + b2)
perimeter of a shape that does not have a formula
add all sides together