6.8 Areas of Circles & Sectors

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Presentation transcript:

6.8 Areas of Circles & Sectors p. 230

Vocabulary Sector of a circle: the region bounded by two __________ of the circle and their ____________arc Area of a Circle: vs. Circumference A = ________ C = ________

Ex. 1 Use the formula for area of a circle Find the indicated measure.

Guided Practice #1-3, p. 230 Find the indicated measure. The diameter of the circle is 11 cm. Find area. The area of the circle is 158.3 square yards. Find the radius. The area of the circle is 1024pi square meters. Find the diameter.

Area of a Sector Theorem (Thm 6.21)

Ex. 2 Find the areas of sectors Find the areas of the sectors formed by <PQR.

Ex. 3 Use the Area of a Sector Theorem Use the diagram to find the area of Circle Y.

Guided Practice #4-5, p. 231 Find the areas of the Find the area of Circle H. sectors from by <ABC.

Homework See Agenda