Classify Triangles and Triangle Sum

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 

• 45°
• 90°
• 180°
• 360°

Find the measure of the missing angle.

• 90^o
• 10⁰
• 130^o
• 50^o

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

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°

Solve for x.

• 6
• -10
• 7
• -9

Find the value of x

• 1

• 15

• 11

• 3

What type of triangle has only one obtuse angle and two congruent sides?

• Right Isosceles Triangle
• Obtuse Isosceles Triangle
• Right Scalene Triangle
• Acute Scalene Triangle