Circumcenter

Circumcenter and Incenter are these of a triangle

• centers

• vertices

• perpendicular bisectors

• angle bisectors

The circumcenter is _________________ inside the triangle.

• always

• sometimes

• never

• definitely

Use the given vertices of the triangle to find the coordinates of the circumcenter.

• (-4,2)

• (2,4)

• (4,2)

• (2,-4)

• 15

• 12.5

• 20

• 25

Name the circumcenter.

• F

• G

• D

• E

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 

Name the point of concurrency shown.

• Circumcenter

• Incenter

• neither

• Pokecenter

Point Z is the circumcenter of ΔRST. What is TZ?

• 3

• 5

• 4

• 6

Do you have enough info to conclude that C is on the perpendicular bisector of AB?

• yes

• no

• maybe