Circles Unit 9

Match the following

• Radius

• 
• Tangent

• 
• Secant

• 
• Chord

• 
• Diameter

• 

What is the length L called?

• circumference

• tangent

• arc

• sector

An arc is a smaller piece of the...

• Chord
• Center
• Circumference
• Radius

This is a picture of ___________.

• Minor Arc
• Major Arc
• Semi-Circle
• Central Angle

A central angle has its vertex at the ​ (a)   of the circle. An inscribed angle has its vertex ​ (b)   the circle.

• center
• on
• outside
• inside

What is the measure of the angle "?"

• 70º

• 90º

• 105º

• 210º

Find the value of the angle marked x....

• 50

• 100

• 80

• 45

What is the standard equation of a circle?

• (x-k)² + (y-h)² = r²

• (x+h)² + (y+k)² = r²

• (x-h)² + (y-k)² = r²

• (k-x)² + (h-y)² = r²

In the equation (x-3)²+(y-2)²=16, the center of the circle is...

• (3,2)
• (-3, -2)
• (-2, -3)
• (2, 3)