MathGeometry & Trigonometry
Practice
Circles Practice
Original questions using circle equations, arcs, sectors, and radius relationships.
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Question 1 of 2
Question 1
Medium
Correct answer\(7\)
Explanation
In standard form, the right side is \(r^2\). Thus \(r=\sqrt{49}=7\).
Question 2 of 2
Question 2
Hard
Correct answer\(20\pi\)
Explanation
The sector is \(72/360=1/5\) of the circle. Its area is \((1/5)\pi(10)^2=20\pi\).
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Questions to review
No mistakes this time. Excellent work.
- Question 1Interpret the standard equation of a circleMedium
- Question 2Calculate sector areaHard