Point (O) is the center of the circle, radius = 655 m, determine the area and perimeter of the sector.

Three pipes, each of radius length 4 in., are stacked as shown. What is the exact height of the stack?

Two circles, whose radii are 12 inches and 16 inches respectively, intersect. The angle between the tangents at either of the points of intersection is ${\displaystyle {20}^{\circ },{30}^{\prime }}$. Find the distance between the centers of the circle.

Five circles are placed in a rectangle as shown. If the length of the shorter side of the rectangle is 1, find the length of the other side.

If the atomic radius of lead is 0.175 nm, calculate the volume of its unit cell in cubic meters

Suppose you have three concentric circles and are looking at the arc lengths of a
${\displaystyle {80}^{\circ }}$ angle of each. If the radii of the circles have a ratio of
${\displaystyle 2:3:5}$
what is the ratio of the arc lengths?

To calculate: Thearea of shaded region which containt one larger circle and three identical smaller circles.

Segment BC is Tangent to Circle A at Point B.
What is the length of Segment BC?