Geometry and TrigonometryEasy–MediumDistance from the centre to a point on the circle
Geometry and Trigonometry practice question
In the xy-plane, a circle has centre (0, 0) and passes through the point (0, −4). What is the diameter of the circle?
Answer: 8
The radius is 4, so the diameter is 8.
Common wrong answers
- If you answered 4
- 4 is the radius.
- If you answered 16
- 16 squares the radius.
- If you answered -4
- −4 is the point's y-coordinate.
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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