Interior Angles of the Triangle Adds Up to 180

Polygons that have three interior angles, three vertices, and three sides are called ______________________.

• Triangles

• Squares

• Pyramids

• Tetrahedrons

The interior angles in a polygon are measured in degrees. The sum of a triangle's internal angles is _____________.

• 180º

• 360º

• 90º

• 270º

The theorem that states the interior angles of a triangle add up to 180º is the __________________________

• Triangle Sum Theorem

• Angle Theorem

• Polygon Angle Theorem

• Supplementary Angle Theorem

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

• 60º

• 90º

• 120º

• 180º

The acute angles in any right triangle are always __________________.

• Complementary

• Supplementary

• Obtuse

• Congruent

The angle formed by one side of a triangle and the extension of the adjacent side is called __________________.

• an exterior angle

• an interior angle

• a congruent angle

• a complementary angle

In a triangle, the interior angle and its adjacent exterior angle form ____________________.

• congruent angles

• a linear pair

• right angles

• vertical angles

The exterior angles of a triangle add up to ______________________.

• 180º

• 90º

• 270º

• 360º

The ________________________________ states the sum of the remote interior angles is equal to the non-adjacent exterior angle.

• Exterior Angle Theorem

• Interior Angle Theorem

• Triangle Congruency Theorem

• Equiangular Triangle Theorem

What is the measure of angle T ?