Sector Area and Arc Length

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Presentation transcript:

Sector Area and Arc Length

Area of a Circle – A = r2

Sector of a Circle The region bounded by 2 radii & their intercepted arc. Sector Also a sector Visually, it might remind you of a slice of pizza or a piece of pie.

Area of a Sector : Area of a full circle * the part of the circle your looking at

Ex1: Find the area of the small sector shown.

Ex. 2: Finding the area of a sector Find the area of the sector shown below. Sector CPD intercepts an arc whose measure is 80°. The radius is 4 ft. m A = • r2 360°

Ex3: L & M are 2 pts. on a circle R with r=50 cm & mLRM=150o Ex3: L & M are 2 pts. on a circle R with r=50 cm & mLRM=150o. Find the areas of the sectors formed by LRM. II R 50 cm L 150o M I

Arc Length What is the circumference of circle A ? What is the arc length of just BC?

Find the length of TBG

Assignment