Relations With Triangles

Find the measure of the missing angle in the triangle.

Use the angles to classify the triangles

Use the angles to classify the triangles

all angles less than 90° - acute triangle

1 angle is equal to 90° - right triangle

1 angle is greater than 90° - obtuse triangle

Classify the triangle buy it's angle measures and it's side lengths.

• Right Isosceles triangle

• Acute Scalene triangle

• Obtuse scalene triangle

• Equilateral triangle

Find the measure of the missing exterior angle of the triangle:

• 70°

• 110°

• 100°

• 180°

All the interior angles of a triangle have a sum of ______.

• 180°

• 90°

• 360°

• 40°

Find the measure of the missing interior angle of the triangle:

• 60°

• 65°

• 115°

• 100°

The measure of an exterior angle of a triangle can be found by:

• finding the sum of the opposite interior angles

• finding the different of the opposite interior angles

• subtracting the sum of the opposite interior angles from 180

• adding up all the angles and hoping for the best

Name the postulate, if possible, that makes the triangles congruent.

• SSS

• SAS

• ASA

• Not Possible

Name the postulate, if possible, that makes the triangles congruent.

• SSS

• SAS

• ASA

• Not Possible