Triangle Sum Theorem and Exterior Angle Theorem Worksheet (with solutions)

Triangle Theorems Bundle

A collection of three worksheets on triangle theorems. One worksheet on triangle sum and exterior angle theorem. Students use these two theorems to solve for angles in a triangle. In the exercises a triangle is given and two of its interior angles are known and the third angle is missing one of the interior angles is known, the triangle is isosceles and the other two angles are missing two of the interior angles are known and the opposite exterior angle is missing one of the interior angles is known, the triangle is isosceles and an exterior angle is missing one interior and one exterior angle are known and an interior angle is required One worksheet on the Triangle Midsegment Theorem. Students will have to solve eight problems in which they will have to find the length of the midesgment or side of a triangle using the triangle midsegment theorem. Some questions require the use of algebra to solve linear equations. And one worksheet on the following triangle and parallel lines theorems: The line segment joining the mid - points of any two sides of a triangle is parallel to the third side and equal to half of it. The median to the hypotenuse of a right triangle is equal to half of the hypotenuse In a right triangle the side opposite the 30 degree angle is half the length of the hypotenuse. If three or more parallel lines cut off congruent segments on one transversal, then they cut off congruent segments on every transversal. Detailed solutions to all worksheets are included.