Lesson 8: area of circles
Words to Know
Sector: a shaded area of a circle
Central Angle: an angle with a vertex at the center of a circle and with sides that intersect the circle
Central Angle: an angle with a vertex at the center of a circle and with sides that intersect the circle
Examples
tips
A circle has 360 degrees.
Extra Examples
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Problems of the Day
1. Find the area of a circle with diameter of 10.5cm.
2. Find the area of a sector with central angle 45 degrees and radius 10m.
2. Find the area of a sector with central angle 45 degrees and radius 10m.