Geometryeasy · Past Paper
If an arc subtends an angle of 60 degrees at the center of a circle of radius 21 cm, find the length of the arc.
A11 cm
B22 cm
C44 cm
D66 cm
✓ Correct Answer: B — 22 cm
Arc length = (theta/360) * 2 * pi * r = (60/360) * 2 * (22/7) * 21 = (1/6) * 132 = 22 cm.
Share this question
More from Geometry
- If the base of an isosceles triangle is 12 cm and its perimeter is 32 cm, find its area.
- Which of the following is always true for the orthocenter of an obtuse triangle?
- Find the value of x if the angles around a point are x, 2x, 3x, and 4x.
- In a right triangle, the length of the median to the hypotenuse is 5 cm. What is the length of the hypotenuse?
- Find the measure of an angle whose supplement is 4 times its complement.