Geometry Circle Radian

Calculate the radian measure of a 225 degree angle. Use any method you like, including sketching in the circle diagram provided.

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• 5 units

• 5 units

Find the measure (in radians) of a central angle of an arc with arc length 4 units and radius 3 units.

• 5 units

Find the diameter of the circle.

• 5 units 

• 4 units

• 12.2 units

• 7.5 units

Is this statement right?

The blue line = circumference.

• Yes

• No

Using the diagram above to identify the diameter of the circle.

• 81 units

• 13.5 units

• 10.1 units

• 101.3units

A circle has radius 10 units. For each angle measure, find the area of a sector of this circle with that central angle.

• 1 radian

• 2 radians

Each circle has a shaded sector with a central angle measured in radians. What fraction of the circle is each sector?

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Clare missed class and Jada is teaching her how to construct the circumscribed circle of a triangle. Here are the instructions Jada wrote.

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