
EM 4-12
Presentation
•
Mathematics
•
3rd Grade
•
Medium
Meagan Obrien
Used 4+ times
FREE Resource
18 Slides • 16 Questions
1
EM 4-12
Rectilinear Figures
2
Before we start: Get out your notes and write these formulas down!
Perimeter = add up all sides
Area = length x width
3
Warm-Up
4
Fill in the Blanks
4 x 5 = ?
Type answer...
5
Fill in the Blanks
0 x 10 = ?
Type answer...
6
Fill in the Blanks
3 x 9 = ?
Type answer...
7
Fill in the Blanks
7 x 6 = ?
Type answer...
8
Multiple Choice
What is the perimeter of this rectangle?
6 cm
10 cm
5 cm
7 cm
9
Multiple Choice
What is the area of this rectangle?
7 inches
7 square inches
12 inches
12 square inches
10
How can we find the area of this shape?
11
We can decompose this shape to form two different shapes
12
13
Let's decompose!
How can we decompose this shape to find the area?
14
Multiple Select
Select the correct ways to decompose this shape to find area
15
16
Let's find the area of rectangle A
Area = length x width
17
Multiple Choice
What is the area of Rectangle A?
13 units
36 square units
36 units
13 square units
18
Let's find the area of rectangle B
Area = length x width
19
Multiple Choice
What is the area of Rectangle B?
10 units
24 units
20 units
24 square units
20
Let's find the area of the figure
In order to find the area of the figure, we need to add the area of Rectangle A and the area of Rectangle B
21
Fill in the Blanks
What is the area of the entire figure? (Rectangle A + Rectangle B)
Type answer...
22
What if we don't have unit boxes?
23
24
Multiple Choice
What is the correct way to decompose this shape?
25
26
Fill in the Blanks
What is the area of Rectangle A?
Type answer...
27
Look at the green ?
How many feet long is that side? (Hint: opposite sides of rectangles are the same length)
28
Look at the green ?
How do you think we can find the length of that side?
29
30
Fill in the Blanks
What is the length of the side with the green ?
Type answer...
31
Fill in the Blanks
What is the area of Rectangle B?
Type answer...
32
Let's find the area of the figure
In order to find the area of the figure, we need to add the area of Rectangle A and the area of Rectangle B
33
Fill in the Blanks
What is the area of the entire figure? (Rectangle A + Rectangle B)
Type answer...
34
Poll
Do you understand how to decompose a shape to find area?
YES
NO
Kinda, but I could use some more practice
EM 4-12
Rectilinear Figures
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