Rectangles and Parallelograms
What is the formula for area of a rectangle?
A = bh
What is the formula for area of a triangle?
A = bh/2
What is the formula for area of a trapezoid?
A = (b1+b2)h / 2
What is the formula for area of a regular polygon?
A = san / 2
What is the formula for area of a circle?
A = πr2
What is the formula for area of a parallelogram?
A = bh
What is the formula for area of a kite?
A = d1d2 / 2
Find the area of the trapezoid with bases 9.9 in and 4.5 in and height of 6 in.
43.2 in2
Find the area of the octagon with side length 12 m and apothem 14.5 m.
696 m2
What are the two formulas for circumference of a circle?
C = 2πr and C = πd
Find the area of the parallelogram whose base is 6.1 ft and the height is 3.1 ft.
18.91 ft2
Find the area of a triangle with base 33 mm and height 21 mm.
346.5 mm2
If the area of a trapezoid is 19.4 cm2 and the bases are 3 cm and 10.4 cm, solve for the height.
2.9 cm
Find the area of the nonagon with side length 9.6 ft and apothem 13.2 ft.
570.2 ft2
Find the circumference of the circle with radius 3 ft. Leave your answer in terms of pi.
6π ft
If the area of a rectangle is 61.2 km2 and the height is 12 km, solve for the base.
5.1 km
If the area of a triangle is 33.8 km2 and the base is 10.4 km, solve for the height.
6.5 km
If the area of a trapezoid is 43.3 in2, one base is 4.4 in, and the height is 5.7 in, solve for the other base.
10.8 in
If the area of a heptagon is 700.56 yd2 and the side length is 13.9 yd, solve for the apothem.
14.4 yd
Find the area of the circle with diameter 21 ft. Round your answer to the nearest tenth.
346.4 ft2
If the area of a parallelogram is 72 cm2 and the height is 6 cm, solve for the base.
12 cm
If the area of a kite is 132 in2 and one diagonal is 12 in, solve for the other diagonal.
22 in
If the area of a trapezoid is 40.5 mi2, one base is 3.4 mi, and the height is 7.1 mi, solve for the other base.
8 mi
If the area of a pentagon is 95.625 km2 and the apothem is 5.1 km, solve for the perimeter.
37.5 km
If the area of a circle is 78.5 km2, solve for the circumference of the circle. Round your answer to the nearest tenth.
31.4 km