Classifying Triangles by Angles

Which type of triangle is pictured?

• Equilateral Triangle

• Right Isosceles Triangle

• Obtuse Scalene Triangle

• Obtuse Equilateral Triangle

Find the measure of the missing angle.

• 90^o

• 10⁰

• 130^o

• 50^o

Solve for x.

• 16

• 11

• 50

• 6

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

• 80

• 100

• 60

• 90

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.

What do the angles in an equilateral triangle measure?

• 30, 60, 90

• 45, 45, 90

• 60, 60, 60

• 35, 55, 90

Find the largest angle in Δ PRQ

• ∠R

• ∠P

• ∠Q

• ∠S

Name the angles from SMALLEST to LARGEST

• Q, R, P

• P, Q, R

• R, P, Q

• R, Q, P

Name the sides from SMALLEST to LARGEST

• RS, ST, TR

• ST, RT, RS

• RT, ST, RS

• RT, RS, ST

Name the angles from LARGEST to SMALLEST

• R, S, T

• S, T, R

• S, R, T

• T, S, R