Topic 7 Review

Which of the following statements must be true? Select all that apply.

• JL bisect IK

• ΔIJK is equilateral

• JL is the perpendicular bisector of IK

• KL = 9

Which of the following statements is true?

• m∠K < m∠O

• ∠J ≅ ∠L

• ∠J ≅ ∠M

• The circumcenter for each triangle is located outside the triangle.

A triangle has vertices at (1, -2), (1, 4), and (-3, 4). Plot the points and the circumcenter of the triangle.

Point M is the centroid of ΔDEF. DK, EL, and FJ are ___.

• altitudes

• angle bisectors

• medians

• perpendicular bisectors

Point M is the centroid of ΔDEF. What is EL?

• 9

• 4

• 3

• 12

Point M is the centroid of ΔDEF. What is an expression for FJ?

• 2x

• 3x

• 2y

• 3y

Point M is the centroid of ΔDEF. What is the order of sides of ΔDEF from shortest to longest?

• EF, DF, DE

• DF, DE, FE

• EF, DE, DF

• not enough information to tell

Point M is the centroid of ΔDEF. Which equation relates DM to MK?

• MK = 1/4 DM

• MK = 1/3 DM

• MK = 1/2 DM

• MK = 2/3 DM

What is m∠DEF?

Mathematical Equivalence

ON

Which of the following describes GE? Select all that apply.

• angle bisector

• median

• perpendicular bisector

• altitude