Formulas
Formula for the parallelogram
Base X height
Find the area
Base= 6cm
Height=7cm
42 cm2
Find the area of the following trapezoid.
B1= 11 ft
B2= 7 ft
H= 7 ft
63 ft2
Find the area
Base= 5cm
Height=12cm
30cm2
Find the area
Length= 7m
Width= 9m
63m2
Formula for area of a triangle
1/2BxH or BxH divided by 2
Find the area
Base= 12in.
Height=9in.
What is 108in2
Find the area of the following trapezoid.
B1= 5 cm
B2= 7.5 cm
H= 6 cm
37.5 cm2
Find the area
Base= 7in
Height=12in
42 inches2
Find the area
Length= 4in
Width=6in
24 inches2
Formula for area of a rectangle
BxH
Find the area
Base= 14ft
Height=19ft
What is 266 ft2
Find the area of the following trapezoid.
B1= 6.3 ft
B2= 3.6 ft
H= 4 ft
19.8 ft2
Find the area
Base= 3ft
Height=7ft
10.5 ft2
Find the area
Length= 11cm
Width=6cm
66 cm2
Formula for perimeter on rectangle
side + side + side + side
Find the area
Base= 5in
Height=7in
35 inches2
Find the height of the following trapezoid.
B1= 8 ft
B2= 14 ft
A= 176 ft
H= 16 ft2
Find the area
Base= 8cm
Height=10cm
What is 40cm2
Find the area
Length= 12cm
Width=4cm
48cm2
Formula for area of a square
BxH
A patio is shaped like a parallelogram.
The base is 14 meters and the height is 6 meters.
a) What is the area of the patio?
b) If paving stones cost $4 per square meter, how much will it cost to cover the patio?
84 square meters
$336
A stage is shaped like a trapezoid.
The front base is 18 feet
The back base is 10 feet
The height is 6 feet
a) What is the area of the stage?
b) If the stage needs to be painted and 1 gallon of paint covers 30 square feet, how many gallons of paint are needed?
84 square feet
3 gallons of paint
A triangular garden has a base of 10 feet and a height of 7 feet.
a) What is the area of the garden?
b) If the gardener wants to cover the garden with soil and needs 1 bag of soil for every 5 square feet, how many bags of soil are needed?
35 square feet
7 bags of soil
A playground is shaped like a rectangle that is 15 meters long and 8 meters wide.
a) What is the area of the playground?
b) If new turf costs $3 per square meter, how much will it cost to cover the playground?
120 square meters
$360