
Understanding Circle Radius from Area

Interactive Video
•
Mathematics, Science
•
5th - 8th Grade
•
Hard

Mia Campbell
FREE Resource
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5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the given area of the circle in the problem?
81 square inches
9 square inches
81π square inches
9π square inches
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula for the area of a circle?
π times radius squared
π times radius
π times circumference
π times diameter squared
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What operation is performed to both sides of the equation to simplify it?
Add π
Divide by π
Multiply by π
Subtract π
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
After simplifying, what is the equation for the radius squared?
radius squared equals 0
radius squared equals 9
radius squared equals 3.14
radius squared equals 81
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is only the positive square root considered for the radius?
Because the radius can be negative
Because the radius is a length and must be positive
Because the radius is always zero
Because the radius is a diameter
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