Angles and Triangles

• 71^o, acute

• 109^o, obtuse

• 71^o, obtuse

• 109^o, acute

Find the missing angle.

• 60
• 70
• 50
• 140

What is the measure of this angle?

• 65^o

• 75^o

• 115^o

• 125^o

What is the measure of the missing angle?

• 76
• 66
• 156
• 154

• 19^o

• 21^o

• 161^o

• 179^o

Two angles added together to produce 90 degrees

• Obtuse

• Supplementary

• Acute

• Complementary

• A
• B
• C
• D

• Equilateral Triangle
• Scalene Triangle
• Isosceles Triangle
• Right Triangle

• A
• B
• C
• D

Classify this triangle by its angles

• Acute

• Obtuse

• Equilangular

• Right