Please pick up the vocabulary crossword

puzzle and see how many you can get without your

notes from yesterday.

Homework Check & Questions??

Isosceles & Equilateral Triangles & Medians

Equilateral Triangles Review1. Draw an equilateral triangle. Use

markings to indicate that the triangle is equilateral.

2. True or false? An equilateral triangle is equiangular. If true, what is the measure of each interior angle? If false, give a counterexample.

3. Solve for x and y:

Cut out the isosceles triangle that I give you and use it to answer the questions below.

The wall at the front entrance to the Rock and Roll Hall of Fame and Museum in Cleveland, Ohio, is an isosceles triangle. The triangle has a vertex angle of 102°. What is the measure of the base angles?

Find the value of x and y.

mACB =

Find the values of m and n.

Given DEF with mD = 3x + 15, mE = 6x-30, mF = 4x. Classify DEF by side length

and angle measure.

A median of a triangle is a segment that joins a vertex of the triangle to the midpoint of

the opposite side.

The point where the medians intersect is called the Centroid.

MediansIsosceles Triangles:• The median to the base is the perpendicular

bisector of the base and is the altitude of the triangle

• The two medians to the congruent sides are congruent

Other triangles

CHU, C(-4,3), H(6,1), U(4,-5)

More Practice with Centroids• In ABC, AU = 16, BU = 12, and CF = 18. Find

each length.• 1. UD 4. EU• 2. CU 5. AD• 3. UF 6. BE