Isosceles and Equilateral Triangles (Section 4-6)

Front

If two sides of a triangle are congruent, then the _________________ opposite those sides are congruent.

Back

angles

Front

If two angles of a triangle are congruent, then the _________________ opposite those angles are congruent.

Back

sides

Front

What is the measure of each angle in an equilateral triangle?

Back

60 degrees

Front

In an isosceles triangle, what can be said about the angles opposite the congruent sides?

Back

They are congruent.

Front

What is the sum of the interior angles of any triangle?

Back

180 degrees

Front

In an isosceles triangle, if one angle measures 40 degrees, what are the measures of the other two angles?

Back

70 degrees each.

Front

What is the relationship between the sides and angles in a triangle?

Back

The larger the angle, the longer the opposite side.

Front

If a triangle has angles measuring 30 degrees, 60 degrees, and 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

In an equilateral triangle, what can be said about the lengths of the sides?

Back

All sides are congruent.

Front

If two angles of a triangle measure 45 degrees each, what is the measure of the third angle?

Back

90 degrees.