Circumcenter

The circumcenter is the point at which all the ______ of a triangle meet.

• perpendicular bisectors

• angle bisectors

• medians

• altitudes

The example from the video is shown. What is the measure of EC?

• 6

• 12

• 15

• 20

The example from the video is shown. What is the measure of GB?

• 6

• 12

• 15

• 20

The example from the video is shown. What was used to find AF?

• The Pythagorean Theorem (a²+b²=c²)

• Triangle Sum Theorem (triangle = 180)

• Definition of bisector

• Trig (SOH-CAH-TOA)

Z is the circumcenter of triangle TUV. Find VY.

• 17

• 15

• 19

• 21

Z is the circumcenter of triangle TUV. Find UZ.

• 17

• 15

• 19

• 21

Define: CIRCUMCENTER OF A TRAINGLE

• the intersection point of the three perpendicular bisectors of a triangle 

• when a circle passes through the three vertices of a triangle 

• the point of intersection of three or more lines 

• the intersection point of the three angle bisectors of a triangle 

Use the Perp Bisector Theorem to find DC

• 4

• 1

• 2

• 3