Definitions/Vocabulary
Area equation is _____ x _____?
height times width
A rectangle with side lengths of 2 cm and 5 cm has an area of _________?
10 cm squared
What is the area of A?
10 x 4 = 40 units squared
Write and solve an equation for figure F
3 x 6 = 18
Zoe has a piece of paper that is 8 inches wide by 9 inches long. She cuts out a square that has a side length of 2 inches. What is the area of the paper that is left after she cuts out the square?
69 square inches
Decompose
An rectangle with side lengths of 3 ft and 7 ft, has an area of ______?
21 feet squared
What is the area of B?
5 x 7 = 35
What is the total area for the figure G
21 + 16 = 37 square units.
Charlotte has a paper that is 4 inches wide by 6 inches long. Emma has two papers. One is 2 inches wide by 5 inches long. The other is 2 inches wide by 7 inches long. Charlotte thinks that they both have the same amount of paper. Is she right or wrong and why?
She is right.
4 x 6 = 24
(2 x 5) + (2 x 7) =
10 + 14 = 24
They are the same.
A rectangle with side lengths of 6 inches and 3 inches, has an area of _____?
18 inches squared
What is the area of C?
29 units squared
What is the area for figure H
25 square units
Luke has a paper that is 7 inches wide by 8 inches long. If he cuts out a rectangle that is 3 inches wide by 4 inches long, how much area is left of the paper?
7 x 8 = 56
3 x 4 = 12
56 - 12 = 44 square inches
Adding the total outside measurements of a shape is called the ___________?
Perimeter
A rectangle with side lengths of 4 units and 9 units, has an area of ______?
36 squared units
What is the area of the shaded part of D?
8 square units.
What is the area of figure I?
86 square units
Brayden and Seth think they have the same amount of paper for an art project. Brayden's paper is 9 inches wide by 6 inches long. Is has a square cut out of it that is 3 inches wide by 5 inches long. Seth's paper is 10 inches wide by 7 inches long. It has a square cut out of it with a side that is 4 inches long. Is the amount of paper they have the same area? Why?
No.
9 x 6 = 54
3 x 5 = 15
54 - 15 = 39 inches squared for Brayden
10 x 7 = 70
4 x 4 = 16
70 - 16 = 54 inches squared for Seth
What is the associative property?
The ability to start with any number in an equation to solve the equation when using all addition or all multiplication.
A rectangle with side lengths of 7 inches and 9 inches, has an area of ______?
63 inches squared
What is the correct equation for figure E?
A. 4 + 6
B. 4 x 6
c. 4 + 4 + 4 + 6 + 6
B. 4 x 6
which equals 24 square units
What is the are for figure J
47 square units
Leah has a paper that is 14 inches wide and 8 inches long. It has a square cut out of it that has a side length of 3 inches. It also has a rectangle cut out of it that is 4 inches wide and 5 inches long. How much paper does Leah have left?
Whole paper: 14 x 8 =
(10 x 8) + (4 x 8) =
80 + 32 = 112
Square: 3 x 3 = 9
Rectangle: 4 x 5 = 20
9 + 20 = 29
112 - 29 = 83 inches squared left