Finding the area of a circle and the sector area

The video explains how to find the area of a sector and how to find the sector area of a circle. Please see the video guide for more detail.

Circles part 2 lesson 4

Video Guide
00:13 Definition of a sector
00:35 Formula for area of a circle
00:40 Sample problem- finding the area of a circle when given the radius
01:26 Sample problem - finding the area of a circle when given the diameter
02:21 Formula for area of a sector reviewed and explained
03:48 Sample problem - find the area of a sector
04:50 Sample problem - find the area of a sector
06:29 Sample problem- find the area of a circle given the sector area
09:20 Sample problem - find the radius of a circle given a central angle and the sector area

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