Isosceles Triangles Bisectors

A triangle with two congruent sides and two congruent angles (base angles) is called ...

• scalene

• equilateral

• isosceles

• obtuse

What is the missing piece of information required to prove these triangles congruent?

• QY ≅ QY

• NY ≅ PY

• ∠N ≅ ∠P

• QY is the perpendicular bisector

The INCENTER is the intersection of which special segments?

• Angle Bisectors

• Perpendicular Bisectors

• Medians

• Altitudes

The figure is an example of a(n) ...

• altitude

• perpendicular bisector

• median

• angle bisector

• Both 1 and 2 are correct

When we are given two angles of a triangle are congruent, we can prove ____________________.

• three sides are congruent

• two sides are congruent

• three angles are congruent

• no other relationships exist

Fill in statement #4.

Fill in reason .

• Prove

• Base angles of an isosceles triangle are congruent.

• CPCTC

• definition of angle bisector

The figure is an example of a(n) ...

• angle bisector

• perpendicular bisector

• median

• altitude

The place where all three angle bisectors meet is called the ...

• Circumcenter

• Orthocenter

• Incenter

• Centroid