Formulas
Perimeter
What's in it?
Wording it right
On the Plane
100

What is the area formula for a rectangle?

A = l * w

100

Find the perimeter of the rectangle with a length of 8 cm and a width of 5 cm.

P = 26 cm

100
Find the area of a rectangle that has a length of 6 1/2cm and a width of 5 1/4 cm.
A = 34 1/8 cm2
100
The classroom is getting new pink carpet. If the room has a length of 10.5m and a width of 6.5 m. How much carpet will the room need.
The room will need 68.5 m2 of carpet.
100
On your coordinate graph whiteboard plot these points and connect them: (-4,1) (-4, 6) (2, 1) What is the shape?
A triangle in quadrants I and II
200

What is the area formula for a square?

A = s * s

200

Find the perimeter of a square that has a side length of 12 cm.

P = 48 cm

200
Find the area of a square with side length of seven and one third inches.
A = 53 7/9 in2
200
The area of a square is 36 cm2. What is the length of a side?
6 cm2
200
On your coordinate graph whiteboard plot these points and connect them: (-4,1) (-4, 6) (2, 1) (2, 6) Name the shape and determine the area of the shape?
rectangle 30
300

How do you find the perimeter of a triangle?

Add up all the outside edges

300

Find the perimeter of a right triangle with one side length 6 ft, one side length 4 ft, and one side length 9 ft.

P = 19 ft

300
Find the area of a triangle with base = 7.2 cm and height = 8 cm.
A = 57.6 in2
300
Mary needs to fence around her backyard. The length of her backyard is 5m and the width is 8m. If fencing comes in sections of 3 how many sections does Mary need to buy?
9 sections
300
The area of a rectangle is 40. If the length is 12, what is the width? (hint= it's a fraction)
3 1/3
400

What is the formula for area of a triangle

A = B(H)/2       or 1/2(BH)

400

Find the perimeter of a rectangle that is has length of 10.5 inches and a width of 2.25 inches

P = 25.5 inches

400
Draw and Find the area of a triangle with base = 9cm, sides of = 7cm, and height = 2cm.
A = 9cm2
400
Mary needs to fence around her backyard. The length of her backyard is 5m and the width is 8m. If fencing comes in sections of 3m and each section costs 4 dollars. How much money will Mary spend?
$36.00
400
Solve for x x +14 =22.45
8.45
500

What is the formula for the area of a trapezoid

A = (B1 + B2)/2  x  H

500

Find the perimeter of square with sides each measuring 1.75 inches 

P= 7 in

500
Find the area of a triangle with base = 210 in and height = 302 in.
A = 31,710 in2
500
(Use the guess and check method )A square pizza box has an area of 324 in2. What is the length of one side of the pizza box?
18 in
500
Draw a right triangle in quadrant IV that includes the point (1,-4) and has an area of 6 square units.
sides must be : 3x4 or 2x12 or 1x 12 or 6x2
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