Circle Tangent Internally to Another Circle Jhun Vert Fri, 05/01/2020 - 05:04 pm

Problem
Two circles as shown below are tangent to each other at point C. If AB = 9 cm and DE = FG = 5 cm, find the area of the shaded region.
 

Two Internally Tangent Circles

 

Solution

Area of Regular Six-Pointed Star Jhun Vert Fri, 05/01/2020 - 04:47 pm

Problem
Find the area of the regular six-pointed star inscribed in a circle of radius 20 cm.
 

Area of Regular Five-Pointed Star Jhun Vert Fri, 05/01/2020 - 01:22 pm

Problem
Find the area of the regular five-pointed star inscribed in a circle of radius 20 cm.
 

Angle between two chords Jhun Vert Fri, 05/01/2020 - 01:20 pm

Problem
Chords AB and AC are drawn on a circle of radius 10 inches. Find the angle between the chords if the arc BAC is 28 inches long.
 

The Circle Jhun Vert Sun, 04/26/2020 - 06:59 pm

Video

The following are short descriptions of the circle shown below.

Tangent
Tangent is a line that would pass through one point on the circle.
Secant
Secant is a line that would pass through two points on the circle.
Chord
Chord is a secant that would terminate on the circle itself.
Diameter, d
Diameter is a chord that passes through the center of the circle.
Radius, r
Radius is one-half of the diameter.

 

The Circle