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Unit 2 - Lesson 14 - Grade 3: Illustrative Mathematics
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Lesson: Find the Area of Figures with Missing Sides
1
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Cool Down: Mystery Side Area
1
Grade 3 Unit 2
Lesson 14: Find the Area of Figures with Missing Sides
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 2
Lesson 14: Find the Area of Figures with Missing Sides
CC BY 2021 Illustrative Mathematics®
Notice and Wonder: Mystery Sides (Warm Up)
1
Question 1
1.
What do you notice?
1
Question 2
2.
What do you wonder?
The Mystery Side
Question 3
3.
Tyler says that the missing side length is 5 meters because it looks longer than the sides that are 4 meters long.
Do you agree or disagree? Be prepared to explain your reasoning.
Practice with Mystery Sides
Question 4
4.
Find the area of the figure. Explain or show your reasoning.
visibility
View drawing
Question 5
5.
Find the area of the figure. Explain or show your reasoning.
visibility
View drawing
Question 6
6.
Find the area of the figure. Explain or show your reasoning.
visibility
View drawing