Finding Circle Chord Secant Tangent Lengths

What is the formula to use when solving for a segment length of intersecting chords in a circle?

• ab=cd

• a(a+b)=c(c+d)

• a+b=c+d

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CCSS.HSG.C.A.2

Solve for x. (Hint: Length of Tangent Lines from the Same External Point)

• 42.4

• 52

• 52.3

• 42

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CCSS.HSG.C.A.2

What is the difference between a tangent line and a secant line?

• A secant intersects the circle twice; a tangent touches the circle once

• A tangent intersects the circle twice; a secant touches the circle once

• A secant goes through the center of the circle; a tangent does not

• A secant is outside the circle; a tangent is inside the circle

What is the formula for finding the missing segment length of a tangent and a secant?

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CCSS.HSG.C.A.2

What formula do you use to find segment lengths in a circle with a tangent and a secant?

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CCSS.HSG.C.A.2

What is in the picture?

• Two tangents

• Two Secants

• Two Chords

• One Secant and One Tangent

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CCSS.HSG.C.A.2

PA and PB are tangents of length 15cm to the circle with centre O. If PRO is a straight line with PR = 9cm, calculate the radius of the circle.

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CCSS.HSG.C.A.2

Match the following part of the circle with its correct label.

• Center

• Diameter

• Chord

• Point S

• Radius

• Tangent Line

If 2 segments from the same external point are tangent to a circle, then they are_.

• Supplementary

• Congruent

• Complimentary

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CCSS.HSG.C.A.2

Find the measure of the missing arc in degrees. (Hint: Intersecting Chords)

• 103

• 16

• 71

• 94

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CCSS.HSG.C.A.2