Circles Equations and Tangents

What is the value of DC? (to the nearest hundredth) 

• 9.43

• 4.43

• √89

• 9

Determine whether segment MP is tangent to the circle.

• YES

• NO

Find the length of BC.

• 2

• 3

• 9

• 14

How many common tangents?

• 0

• 1

• 2

• 3

• 4

How many common tangents?

• 0

• 1

• 2

• 3

• 4

How many common tangents?

• 0

• 1

• 2

• 3

• 4

Assume that all the lines that appear tangent are tangent. Find the perimeter

• 54

• 36

• 48

• 42

What are the coordinates of the center and the radius of the circle with equation:
(x - 4)² + (y - 3)² = 25 ?

• Center (4,3)
  Radius = 5 units

• Center (4,3)
  Radius = 25 units

• Center (-4,-3)
  Radius = 25 units

• Center (-4,-3)
  Radius = 5 units

A circle has an area of 124 cm2. Find the the diameter of the circle. (Use π = 22/7)

• 6.28 cm

• 12.56 cm

• 7.73

• 15.56

what is the formula for finding area of a circle

• C = π r²

• A = π r²

• A = π r² / 2

• C = 2 π r