10.1 & 10.2 - Circles, Circumference, & Arcs

Select the chords (2 answers)

• KH

• DEF

• GH

• JG

• DK

Select the diameter

• KH

• DE

• GH

• KG

• DK

A ____ angle is an angle whose vertex is a the center of a circle.

• supplementary

• complimentary

• central

• obtuse

 A circle has a circumference of 12π cm. What is the diameter of the circle?

• 12 cm

• 6 cm

• 18 cm 

A square with side length 4 is inscribed a circle. What is the circumference of the circle?

• $16\pi$
  

• $4\pi\sqrt{2}$

• $8\sqrt{2}$

• $8\pi\sqrt{2}$

• A

• B

• C

• D

• A

• B

• C

• D

Which is true of a minor arc?

• It forms half a circle.

• It forms a whole circle.

• It measures greater than 180 degrees. 

• It measures less than 180 degrees.

Which is true of a major arc?

• Forms half a circle.

• Forms a whole circle.

• Measures greater than 180 degrees.

• Measures less than 180 degrees.

Find the circumference of the circle.

• 25.1 cm

• 18.5 cm

• 31.4 cm

• 10 cm