Classify Triangles and Missing

Which equation can be used to find the missing angle?

• x = 45 + 88

• x - 45 = 180

• x + 88 + 45 = 90

• x + 133 = 180

Which equation can be used to find the missing angle?

• x + 40 = 90

• x + 90 = 180

• x - 40 = 180

• x + 130 = 180

Find the measure of the missing angle.

• 90^o

• 10⁰

• 130^o

• 50^o

Classify this triangle by its angles

• Acute

• Equiangular

• Obtuse

• Right

Classify this triangle by its angles

• Acute

• Equiangular

• Obtuse

• Right

Classify this triangle by its angles

• Acute

• Equiangular

• Obtuse

• Right

What makes this a scalene triangle?

• There is one obtuse angle

• All sides have a different length

• There are two acute angles

• There is one right angle

Describe the triangles found in this pizza slice.

• Acute

• Equilateral

• Obtuse

• Isosceles

• Scalene

Select the letter that represents a right isosceles triangle. 

• A

• B

• C

• D

An isosceles triangle has: (select two answers)

• three equal angles

• two equal side lengths

• four equal side lengths

• two equal angles