Proof that the measure of an inscribed angle is half the measure of a central angle when the angles intercept the same arc. [14:16]

This lesson explains how the central angle can be used to determine the area of a sector. It is 3 of 5 in the series titled "Finding the Area of a Sector Using the Central Angle." [8:03]

This lesson explains how the central angle can be used to determine the area of a sector. It is 4 of 5 in the series titled "Finding the Area of a Sector Using the Central Angle." [4:53]

This lesson explains how the central angle can be used to determine the area of a sector. It is 1 of 5 in the series titled "Finding the Area of a Sector Using the Central Angle." [2:53]

This tutorial provides an introduction to the term sector and gives you examples of sectors. [2:23]

Central angles are defined in this tutorial. Students learn about the math concept by watching a video lesson.

Video shows how to find an angle inscribed in a circle. [1:58]

The video lesson from Khan Academy provides practice questions for the SAT. Watch Sal work through a harder Circle theorems problem.

This lesson explains how the central angle can be used to determine the area of a sector. It is 5 of 5 in the series titled "Finding the Area of a Sector Using the Central Angle."

This lesson defines the phrase central angle.

This lesson defines the phrase central angle. Student can watch a video tutorial and then take an online quiz.

This lesson will demonstrate how to find the area and radius of a circle when given the sector area and central angle measure. It is 1 of 8 in the series titled "Sector Area of a Circle."

This video lesson describes the term central angle.

This lesson will demonstrate how to find the area and radius of a circle when given the sector area and central angle measure. It is 5 of 8 in the series titled "Sector Area of a Circle."

This lesson will demonstrate how to find the area and radius of a circle when given the sector area and central angle measure. It is 7 of 8 in the series titled "Sector Area of a Circle."

This lesson will demonstrate how to find the area and radius of a circle when given the sector area and central angle measure. It is 8 of 8 in the series titled "Sector Area of a Circle."