6.1-6.1 Review

Is DE parallel to BC?

• Yes
• No

Is DE 1/2 the length of BC?

• Yes
• No

Find the length of AB

• 6
• 11
• 17
• 68

What is the length of AB?

• 4
• 8
• 16
• 24

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 

Define: INCENTER OF A TRIANGLE

• the intersection point of the three angle bisectors of a triangle 
• when three or more lines intersect at a single point 
• the intersection point of the three perpendicular bisectors of a triangle 
• the point of intersection of three or more lines 

Name the point of concurrency shown.

• Circumcenter
• Incenter
• Supercenter
• Neither

Name the point of concurrency shown.

• Circumcenter
• Incenter
• Supercenter
• Neither

Point P is the circumcenter, which segment is equal to PB

• DA
• AC
• PC
• PF

Use the Perp Bisector Theorem to find PQ

• 10
• 3
• -2
• 5