Area Formulas
Find the area of the rectangle with a base of 8cm and a height of 5 cm.
A = 40cm2
Which of the following examples would be used to describe an Area?
cm cm1 cm2 cm3
cm2
The classroom is getting new pink carpet. If the room has a length of 20ft and a width of 20ft, how much carpet will the room need?
The room will need 400ft2 of carpet.
If you change the dimensions of a triangle by 2x, what what will the perimeter change by?
2x
Find the area of a square that has a side length of 12ft.
A= 144ft2
How many unit dimensions is a perimeter measured in?
1
The area of a square is 36 cm2. What is the length of a side?
6 cm
Define Composite Figure
More than 1 shape combined into 1
Find the area of a right triangle with one side length 13ft, and the height of 4ft.
A=26ft2
Although we did not do it yet this chapter, in the next one, Volume would be represented in how many dimensions?
3
Mary needs to plant grass in her backyard. Her backyard is 36 ft wide and 60 ft long. What is the area of ground that needs grass?
2160ft2
If you change the dimensions of a parallelogram by 3x, what what will the area change by?
32 = 9 times
What is the formula for the area of a trapezoid?
A = 1/2h(b1+b2)
Find the area of a triangle if it has a base of 6m, a side of 5m and a height of 8m.
A=24m2
If you are given the Area and the base, and the question asks you to find the height in meters, what would you label your answer when you find it?
m
Mr. Fish has a bald spot on his head of 2cm by 1.5cm. What is the total area of Mr. Fish's bald spot?
3cm2
Draw a coordinate plane. Label it with the x and y axis, as well as the positive and negative numbers up to 3 in each direction. (You do not need to label the quadrants)
See Pictures
How do you find the Area of a Composite Figure?
Split it into smaller figures with known formulas, then add them together at the end.
Find the area of a trapezoid with bases of 6 in and 8 in and height of 3in.
A=21in2
If you are given both bases and the height of a trapezoid, and the question asks you to find the Area in miles, what would you label your answer when you find it?
mi2
Cory needs to carpet his bedroom. His bedroom is 12 ft by 14 ft. Carpet costs $3 per square foot. How much will it cost total?
$504
Define Polygon.
3 or more, straight sides, closed.