Circles Theorem Review

What is this an example of?

• radius

• Diameter

• chord

• secant

Tags

CCSS.HSG.C.A.2

If a radius is 5 cm then what is the length of the diameter?

Tags

CCSS.7.G.B.4

If a diameter is 36 cm then what is the radius?

Tags

CCSS.7.G.B.4

Which segment is a radius?

• RO

• AO

• OB

• all the above

Use previous knowledge to figure out how to solve for line segment RP. (use Pythagorean theorem)

• 74.45

Tags

CCSS.HSG.C.A.2

What is the definition of the center of a circle?

• A segment whose endpoints are on a circle.

• An angle whose vertex is the center of a circle.

• The point from which all points on a circle are equidistant.

• Two endpoints on a circle and all of the points on the circle between those two endpoints.

The radius is half of the _________.

• TANGENT LINE

• DIAMETER

• SECANT LINE

• CHORD

Tags

CCSS.HSG.C.A.2

What does Theorem 12-14 tell us?

• If two lines intersect inside the circle, you take half of the sum of the arcs.

• If two lines intersect inside the circle, you take half of the difference of the arcs.

• If two lines intersect outside the circle, you take half of the sum of the arcs.

• If two lines intersect outside the circle, you take half of the difference of the arcs.

Tags

CCSS.HSG.C.A.2

What is the formula for ARC LENGTH?

• mARC/360* 2pi(r)

• mARC/180* 2pi(r)

• mARC/360* 2pi

• mARC/360* pi

Tags

CCSS.HSG.C.B.5

A tangent line is ___________ to the radius.

• parallel

• opposite

• perpendicular

• adjacent