How to find the length of an arc

Practice Questions

SAT Math › How to find the length of an arc

Questions

4

1

Secant

Figure NOT drawn to scale

Refer to the above figure. Evaluate .

2

In the figure above, $\overline{AC}$ and $\overline{BD}$ are diameters of the cirlce, which has a radius of . What is the sum of the lengths of arcs $\widehat{AB}$ and $\widehat{CD}$ ?

3

Circle

In the circle above, the angle A in radians is $\frac{\pi}{4}$

What is the length of arc A?

4

Figure not drawn to scale.

In the figure above, circle C has a radius of 18, and the measure of angle ACB is equal to 100°. What is the perimeter of the red shaded region?

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