Formulas
Area of a circle
pi x r2
Area Circle = radius 10 ft.
314 sq. ft.
Square Perimeter =
Side 12 ft. 3 in.
49 ft.
Convert 5 lb. 6 oz. to ounces
86 oz.
Find what percent 80 is of 25.
320%
Area of a square
Area Circle = diameter 18 ft.
254.34 sq. ft.
Rectangle Perimeter =
Length 17 ft. Width 13 ft.
60 ft.
Write 1 3/8 percent as a decimal
.01375
32 x 42
144
Perimeter of a rectangle
(2 x l) + (2 x w)
Area Circle = radius 7m
153.86 m2
Triangle Perimeter =
a = 4.1 m b = 3.7 m c = 4.1 m
11.9 m
Find the percent of increase from $6 to $8. Round to whole percent.
33%
9.438 divided by .6
15.73
Circumference of a circle
pi x d
Circle Circumference = Radius 4 ft.
25.12 ft.
Triangle Area =
base 12 in. height 10 in. length 15 in
60 sq. in.
Find 20% more than $75.
$90
On a map 1 inch = 50 miles. How far is 3.5 inches?
175 miles
Area of a triangle
1/2 b x h
Circle Circumference = Diameter 30 in.
94.2 in.
Area parallelogram =
Length 15 in. width 9 in. height 20 in.
150 sq. in.
Find 18% less than $200.
$164
The cost of four meals at a restaurant was $62.80. They gave a 15% tip to the server. How much did the server get?
$9.42