Tangents Chords and Secants Formulas

A line segment on the interior of a circle with endpoints on the circle

• Radius

• Diameter

• Secant

• Chord

A line that passes through a circle

• Secant

• Tangent

• Chord

• Radius

A line segment connecting any two points on a circle is called a _____________. 

• diameter

• chord

• radius

• circumference 

Name a chord.

• Segment XC

• Segment LM

• Segment HJ

• LINE BD

• 33
• 18
• 46
• 16

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.

Where in the intersection of the lines shown?

• Inside the circle

• Outside the circle

• On the circle

• The secants do not intersect.

Where in the intersection of the secants shown?

• Inside the circle

• Outside the circle

• On the circle

• The secants do not intersect.

• Secant

• Tangent

• Chord

• Point of Tangency

If ST = 8 and SW = 17, then TW = ​ (a)   , SD = ​ (b)   , and DW = ​ (c)  

• 8

• 15

• 9

• 18.8

• 225