Circles for Geometry

What is the center of the circle with equation x² + y² = 1?

• (1, 1)

• (0, 0)

• not enough information

solve for x.

hint* central angle = arc measure. diameter makes a semicircle = 180 degrees

• 21.25

• 13.6

• 43.75

• 10

Find the measure of angle ABD.

Find the length of the minor arc of circle R.

Which of the following names a diameter?

• segment AC

• segment DB

• segment AB

• segment BC

• 7
• 2
• 4
• 5

Which segment is the diameter?

• AC

• BD

• LM

• CE

What is this called?

• Chord

• Minor arc

• Secant

• Diameter

Find the length of the 45 degree arc.

• 45π

Find m<A.