Find Segment Lengths in Circles

Lengths with Circles

By Lisa Waldman

Naming lines & segments

Lengths in circles.....​

Notice SECANTS & TANGENTS are lines

​

Notice CHORD, RADIUS, & DIAMETER

are segments with endpoints!​

Multiple Choice

Name the part of the circle: line BJ

• secant

• tangent

• chord

• diameter

Multiple Choice

Name the part of the circle: line BD

• secant

• tangent

• chord

• diameter

Multiple Choice

Name the part of the circle: segment DG

• secant

• tangent

• chord

• diameter

Multiple Choice

Name the part of the circle: segment HF

• secant

• tangent

• chord

• diameter

Multiple Choice

Name the part of the circle: line CD

• secant

• tangent

• chord

• diameter

Tangents

Set 2 tangents EQUAL! or use PYTHAGOREAN THM

Lengths in circles

Multiple Choice

Solve for the TANGENT length

• 3

• 16

• 10/5

• 20

Multiple Choice

Solve for the TANGENT length.

• 4

• 16

• 11

• 20

Multiple Choice

Find the value of X

• 12

• 17

• 18

• 20

Chords

Lengths of Circles

​PRODUCTS are equal!

Multiple Choice

Find the missing variable

• 7

• 4

• 4.33

• 4.67

Multiple Choice

Find the missing variable

• 3

• 4

• 3.5

• 4.67

Secant/Tangents

Lengths of Circles

​OUTSIDE(TOTAL)=OUTSIDE(TOTAL)

Multiple Choice

Find the missing value

• 5

• 5.33

• 5.67

• 1.5

Multiple Choice

Find the missing value

• 30

• 40

• 50

• 60