AnswersGrade 7 MathematicsPractice TestQuestion 2
2
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Practice Test

Question 2 • Grade 7 Mathematics

Kayley needs to find the area of a circle. Which process should she use?

Answer
A
She should multiply the radius by 2 and then multiply the result by 3 point 1 4 .
B
She should multiply the diameter by 2 and then multiply the result by 3 point 1 4 .
C
She should square the radius and then multiply the result by 3 point 1 4 .
D
She should square the diameter and then multiply the result by 3 point 1 4 .

Explanation

The area of a circle is found with the formula A = πr². So Kayley should square the radius and multiply by 3.14. Choice C describes this process; multiplying the radius or diameter by 3.14 instead relates to circumference, not area.

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