Circles Review 1

Which segment is the diameter?

• AC
• BD
• LM
• CE

The definition of radius is

• distance from one point to another point

• distance around the circle

• distance from the center to any point on the circle

• distance across the circle through the center

Find the radius of the circle

• 20 ft

• 10 ft

• 5.5 ft

• 10

what is the formula for finding area of a circle

• C = π r²

• A = π r²

• A = π r² / 2

• C = 2 π r

Identify a chord.

• RT

• LT

• WL

• LR

Identify a radius.

• RS

• ST

• WL

• RT

If the diameter of a circle is 15 in, find the circumference.

• 30 cm

• 30π cm

• 15π cm

• 15 cm

Write the equation of a circle with center (7, 0) with radius 3.

• (x - 7)² + y² = 9

• x² + (y -7)² = 9

• (x - 7)² + y² = 3

• x² + (y -7)² = 3

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

What is the equation of the circle?

• (x+1)² + (y +1)² = 3

• (x+1)² + (y -1)² = 3

• (x+1)² + (y +1)² = 9

• (x-1)² + (y -1)² = 9