Geometry and TrigonometryEasy–MediumCurved edge of a semicircle
Geometry and Trigonometry practice question
A semicircle has a diameter of 12. The length of its curved edge can be written as kπ. What is the value of k?
Answer: 6
The full circle's circumference is 12π; half of it is 6π.
Common wrong answers
- If you answered 3
- 3 halves twice.
- If you answered 12
- 12 is the full circumference's coefficient.
- If you answered 36
- 36 is the full circle's area coefficient.
More Geometry and Trigonometry questions
- Easy–Medium
A circle has a radius of 6. What is its area? (Use A = πr².) - Easy–Medium
A right triangle has legs of length 6 and 8. What is the length of the hypotenuse? - Easy–Medium
A circle has a radius of 5. What is its circumference? (Use C = 2πr.) - Easy–Medium
What is the midpoint of the segment joining the points (2, 3) and (8, 11)? - Easy–Medium
What is the measure, in degrees, of angle B? - Easy–Medium
What is the area, in square centimeters, of the trapezoid?
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