Area & Perimeter of Rectangles, & Parallelograms

Formulas

100

What is the perimeter formula for a rectangle?

P = L + L + W + W OR, P = 2L + 2W OR, P = 2(L + W)

200

What is the area formula for a rectangle?

Area = length x width OR, A = lw

300

What is the area formula for a parallelogram?

Area = base x height A = bh

400

What shape is this formula for 2xL+2xW?

Perimeter of a Rectangle

500

There are two formulas for area that we have learned so far. What are they? 

BxH 

LxW

Perimeter of a Rectangle

100

A rectangle has a length of 8 cm and a width of 5 cm. What is the perimeter of this rectangle?

p = 2L + 2W

p = 2(8) + 2(5) p = 16 + 10 p= 26cm²

200

A rectangle has a length of 18 cm and a width of 13 cm. What is the perimeter of this rectangle?

p = 2L + 2W p = 2(18) + 2(13) p = 36 + 26 p = 62 cm

300

A rectangle has a length of 8.6 m and a width of 5 m. What is the perimeter of this rectangle?

p = 2L + 2W p = 2(8.6) +2(5) p = 17.2 + 10 p = 27.2 m

400

A rectangle has a length of 24.8 inches and a width of 12.78 inches. What is the perimeter of this rectangle?

p = 2L + 2W p = 2(24.8) + 2(12.78) p = 49.6 + 25.56 p = 75.16 inches

500

A rectangle has an area of 24 square cm and a length of 8 cm. What is the perimeter of this rectangle? **Hint: calculate the width first, and then calculate the perimeter.

A = LW P = 2L + 2W 24 = 8W P = 2(8) + 2(3) 3 = W P = 16 + 6 p = 22 cm

Area of a Rectangle

100

A rectangle has a length of 8 inches and a width of 5 inches. What is the area of this rectangle?

A = lw A = (8)(5) A = 40 inches squared

200

A rectangle has a length of 18 cm and a width of 13 cm. What is the area of this rectangle?

A = lw A = (18)(13) A = 234 cm

300

A rectangle has a length of 8.6 m and a width of 5 m. What is the area of this rectangle?

A = lw A = (8.6)(5) A = 43 meters squared

400

A rectangle has a length of 24.8 inches and a width of 12.78 inches. What is the area of this rectangle?

A = lw A = (24.8)(12.78) A = 316.944

500

A rectangle has an area of 54 inches squared and a width of 6 inches. What is the length of the rectangle?

A = LW 54 = L(6) solve for the variable 9 inches = L

Area of a Parallelogram

100

A parallelogram has a base of 6 feet and a height of 4 feet. What is the area of this parallelogram?

A = Base x Height A = (6)(4) A = 24 feet squared

200

A parallelogram has a base of 14 feet and a height of 7 feet. What is the area of this parallelogram?

A = bh A = (14)(7) A = 98 feet squared

300

A parallelogram has a base of 7.8 feet and a height of 3 feet. What is the area of this parallelogram?

A = bh A = (7.8)(3) A = 23.4 feet squared

400

A parallelogram has a base of 13.8 yards and a height of 4.2 yards. What is the area of this parallelogram?

A = bh A = (13.8)(4.2) A = 57.96 square yards

500

A parallelogram has an area of 45 square inches and a base of 5 inches. What is the height of this parallelogram?

A = bh 45 = (5)h 9 inches = h

Area of a Parallelogram (advanced)

100

A parallelogram has a base of 9 meters and height of 6 meters. What is the area of the parallelogram?

A = bxh = 9x6 = 54 meters squared

200

A parallelogram has a base of 24 km and a height of 14 km. What is the area?

A = bxh = 24 X 14 = 336 km²

300

A parallelogram has a base of 3.5 cm and a height of 9 cm. What is the area?

A = bxh = 3.5 x 9 = 31.5cm²

400

A parallelogram has a base of 152 mm and a height of 111 mm. What is the area?

A = bxh = 152x111=16 872mm²

500

The base of a parallelogram is 123mm and the height is 42cm. What is the area? 

A = bxh = 123x420=51 660mm²