Isosceles and Equilateral triangles

Front

What is an equilateral triangle?

Back

A triangle in which all three sides are of equal length and all three angles are equal, measuring 60 degrees each.

Front

What is an isosceles triangle?

Back

A triangle that has at least two sides of equal length and the angles opposite those sides are also equal.

Front

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

Back

180 degrees.

Front

If two angles of a triangle are equal, what can be said about the sides opposite those angles?

Back

The sides opposite the equal angles are also equal.

Front

What is the relationship between the angles in an equilateral triangle?

Back

All angles are equal and each measures 60 degrees.

Front

How do you find the measure of an unknown angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the definition of congruent triangles?

Back

Triangles that are identical in shape and size, meaning all corresponding sides and angles are equal.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides.

Front

What type of triangle has no equal sides?

Back

Scalene triangle.

Front

What is the base angle theorem?

Back

In an isosceles triangle, the angles opposite the equal sides are equal.