Grade 7 McGraw Hill Glencoe - Answer Keys Answer keys Chapter 8: Measure Figures; Lesson 2: Area of Circles

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Grade 7 McGraw Hill Glencoe - Answer Keys

Chapter 8: Measure Figures; Lesson 2: Area of Circles

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Question 13 (request help)
Justify Conclusions Harry’s Pizzeria is having a sale on medium and large pizzas. Medium pizzas are 10 inches in diameter and cost $7.99. Large pizzas are 14 inches in diameter and cost $14.99. Which size pizza is the better deal? Explain. (Hint: Find the cost per square inch of each pizza.)

Question 14 (request help)
Model with Mathematics Write a real-world problem that involves finding the area of two circles. Then solve your problem.
Type below:

Question 15 (request help)
Reason Inductively If the length of the radius of a circle is doubled, how does that affect the circumference and area? Explain.
Type below:

Persevere with Problems Find the area of the shaded region in each figure. Round to the nearest tenth.

$A\approx$

$m^2$

$A\approx$

$in^2$

$A\approx$

$cm^2$

Question 19 (request help)
Which equation could be used to find the area in square inches of a circle with a diameter of 12 inches?
- A. $A = 6 × \pi$
- B. $ A = \pi × 6 ^2$
- C. $ A = 12 × \pi$
- D. $ A = \pi × 12^2$