Circles

3 Act Math

Act 1


1. Which circle will fill up first?
2. Write down a guess.


Act 2

3. What information would be useful to figure this out?
4. Write down some questions you have in your head right now.

Mix Diameter
Mix Height
Big Pancakes
Small Pancakes

Act 3


Sequel

5. What would happen if the blue circle was 5% larger?
6. What would happen if the yellow circle was 5% smaller?


Common Core Standards
7.RP
Analyze proportional relationships and use them to solve real-world and mathematical problems.
7.G.B.4
Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.
TEKS
7.4(D)
solve problems involving ratios, rates, and percents, including multi-step problems involving percent increase and percent decrease, and financial literacy problems
7.5(C)
solve mathematical and real-world problems involving similar shape and scale drawings

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