If two angles of a triangle are congruent, then the sides ____________ those angles are congruent.

A triangle is equilateral if and only if it is _____________

A triangle with two congruent sides:

The angle formed by the two legs of an isosceles triangle:

A triangle with one obtuse angle:

The two acute angles of a right triangle are:

A triangle with three acute angles:

If two sides of a triangle are ___________, then the angles opposite those sides (the base angles) are congruent.

The ___________ angle of a triangle is equal to the sum of the two nonadjacent interior angles.

A triangle with no congruent sides:

A triangle with one right angle:

The two congruent sides of an isosceles triangle are called the __________

The sum of the interior angles of a triangle is always:

A statement that can be proved easily using a theorem:

The angles along the base of an isosceles triangle are called: