Formulas
How do you find the perimeter of a rectangle, parallelogram, trapezoid, or triangle?
Add all the sides
A triangle has a base of 8 inches and a height of 5 inches. What is the area of this triangle?
A = 5*8 / 2
A = 20in squared
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
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
A trapezoid has a base of 9 meters and a base of 6 meters. The height of the trapezoid is 6 meters. What is the area of the trapezoid?
A = (9 + 6)(6) divided by 2
A = (15)(6) divided by 2
A = (90) divided by 2
A = 45 meters squared
What is the area formula for a rectangle?
Area = base x height or A = bh
A triangle has a base of 8 cm and a height of 12cm. What is the area of this triangle?
A = 8 * 12 / 2
A = 48 cm squared
A rectangle has a length of 10 cm and a width of 13 cm. What is the area of this rectangle?
A = 10 * 13
A = 130 cm squared
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
A trapezoid has a base of 8 feet and a base of 12 feet. The height of the trapezoid is 4 feet. What is the area of the trapezoid?
A = (8 + 12)(4) divided by 2
A = (20)(4) divided by 2
A = (80) divided by 2
A = 40 meters squared
What is the area formula for a triangle?
Area = base x height divided by 2
A triangle has a base of 14ft and a height of 6ft. What is the area?
A = 14 * 6 / 2
A = 42ft squared
A rectangle has a length of 12 m and a width of 5 m. What is the area of this rectangle?
A = 12 * 5
A = 60 m squared
A parallelogram has a base of 7 feet and a height of 3 feet. What is the area of this parallelogram?
A = 7 * 3
A = 21ft squared
A trapezoid has a base of 3 inches and a base of 9 inches. The height of the trapezoid is 7 inches. What is the area of the trapezoid?
A = (9 +3)(7) divided by 2
A = (12)(7) divided by 2
A = (84) divided by 2
A = 42 meters squared
What is the area formula for a parallelogram?
Area =base * height or A = bh
A triangle has a base of 5cm a side of 3cm and a height of 4 cm. What is the area?
A = 5 * 4 / 2
A = 10cm squared
A rectangle has a length of 1.2 inches and a width of 0.5 inches. What is the area of this rectangle?
A = 1.2 * .5
A = 0.6
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
A trapezoid has a base of 4 inches and a base of 3 feet. The height of the trapezoid is 2.2 feet. What is the area of the trapezoid?
A = (4 + 3)(2.2) divided by 2
A = (7)(2.2) divided by 2
A = (15.4) divided by 2
A = 7.7 meters squared
What is the formula for finding the area of a trapezoid?
Area = (base 1 + base 2)*(height) divided by 2
A triangle has an area of 24in squared and a base of 6 in. What is the height?
A = b * h / 2
24 = 6 * h / 2
height is 8in
A rectangle has an area of 54 inches squared and a height of 6 inches. What is the base of the rectangle?
A = bh
54 = b(6)
base = 9in
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
height = 9 inches
The length of a trapezoids leg's are both 6 cm. One of it's bases is 5 cm and the other base is 11 cm. The height of the trapezoid is 8 cm. What is the area of the trapezoid?
A = (5 + 11)(8) divided by 2
A = (16)(8) divided by 2
A = (128) divided by 2
A = 64 meters squared