Geometry and TrigonometryEasy–MediumDiameter of a circle through a given point
Geometry and Trigonometry practice question
In the xy-plane, a circle has its centre at the origin and passes through the point (0, 5). What is the length of its diameter?
Answer: 10
The radius is the distance from (0, 0) to (0, 5), which is 5; the diameter is 10.
Common wrong answers
- If you answered 5
- 5 is the radius.
- If you answered 20
- 20 doubles the diameter.
- If you answered 25
- 25 is the radius squared.
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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