Circles
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High School Geometry
High School Geometry
Math

 Name _____________________________ Date ___________________ (Key 1 - Answer ID # 0975090)
1.

Draw a circle O with radius 23. Then draw radii and to form an angle of 60 degrees. What is the length of ?

2.

If a minor arc makes a central angle of 58°, what is the measure of the angle made by its complementary major arc?

3.

If an arc makes a central angle of 94°, is it a major or minor arc? Explain how you know.

4.

Secants and are drawn to circle O. If mC = 31 and m = 126, find m.

5.

What is a semicircle?

6.

Can any chord on a circle be a radius?

7.

Regular pentagon ABCDE inscribed in circle O with radius 5 cm. Find the length of and m.

8.

is a diameter of circle O. m = 51 and m = 28. Find mODA + mOCA.

9.

In circle O, chords and intersect at E. m = 134, m = (7x - 40), and mAEC = (3x + 56). Find m.

10.

An angle formed by two tangents must be less than 90 degrees.
 True False

11.

In a circle whose radius is 12 cm, a central angle intercepts an arc that measures 45. What is the arc length? Round your answer to the nearest hundredth of a centimeter.

12.

Six points lie on the circumference of a circle. How many inscribed triangles can be constructed having any three of these points as vertices?

Circles
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