Classifying Triangles, Triangle Sum Theorem, Exterior Angles

The angles of all triangles add up to _______

• 270 degrees

• 160 degrees

• 180 degrees

• 90 degrees

A triangle with 3 congruent sides is called a(n) ______

• Isosceles Triangle

• Equilateral Triangle

• Obtuse Triangle

• Irregular Triangle

Classify each triangle by its angles and sides.

• Acute, Isosceles

• Obtuse, Isosceles

• Right, Scalene

• Equiangular, Equilateral,

• Acute, Scalene

Classify each triangle by its angles and sides.

• Acute, Isosceles

• Obtuse, Isosceles

• Right, Scalene

• Equiangular, Equilateral,

• Acute, Scalene

Find the value of x.

• A

• B

• C

• D

Classify each triangle by its angles and sides.

• Acute, Isosceles

• Obtuse, Isosceles

• Right, Scalene

• Equiangular, Equilateral,

• Acute, Scalene

Solve for x.

• 16

• 11

• 50

• 6

Find the measure of the angle indicated. 

• 139°

• 66°

• 138°

• 116°

Which two angles are the remote interior angles to Angle W?

• Angle X and Angle Y

• Angle X and Angle Z

• Angle Y and Angle Z

• Angle Z and Angle W

What is the measure of x?

• 101°

• 111°

• 121°

• 131°