Classifying and Finding Angles in Triangles

Find the missing angle in the triangle.

60, x, x

• x = 45 degrees

• x = 60 degrees

• x = 90 degrees

• x = 30 degrees

Find the missing angle in the triangle.

60, 50, x + 10

• x = 70

• x = 80

• x = 60

• x = 90

How many acute angles do Acute Triangles need to have?

• 1

• 2

• 3

What type of triangle has 3 different side lengths and angles?

• Obtuse

• Isosceles

• Scalene

• Acute

How many triangles exist with the following angle measures?
80°, 50°, 50°
(a)  

• More than one unique triangle exists with the given angle measures.

• No triangle exists with the given angle measures.

• Exactly one unique triangle exists with the given angle measures.

Find the missing angle in the triangle.

132, x, x

• 24 degrees

• 48 degrees

• 180 degrees

• 90 degrees

Find the missing angle in the triangle.

40, 100, 2x

• x = 40

• x = 80

• x = 180

• x = 20

In a triangle, how many total degrees are there?

• 100%

• 180 degrees

• it varies

• 360 degrees

If two of the angles of a triangle are 30 and 70 degrees, the third angle measures...

• 80

• 100

• 60

• 90

What is the third angle of a triangle whose 1st angle is 34 and 2nd angle is 101?

• 32

• 39

• 45

• 54