Unit 9 Review

The triangles in the image are most like what kind of triangle?

• Scalene
• Isocoles
• Equilateral
• Obtuse 

What would these angles be classified as?

• Obtuse
• Acute
• Right

Obtuse angles have measures that are greater than what?

• 90
• 85
• 0
• 45

An Acute Angle has measures that are less than 90 degrees?

• True
• False

Triangle ABC is an isosceles triangle. One of the equal angles has a measure of 30 degrees. What is the measure of the third angle? 

• 120 degrees
• 60
• 180
• 456

Triangle GHI is an equilateral triangle. What do you know about the angles? 

• All angles are 45 degrees.
• All angles are 60 degrees.
• There is one angle that is 180 degrees. 
• There are no angles. 

Do the following 3 lengths form a triangle? 2 meters, 2 meters, and 4 meters. 

• Yes 
• No 

Do the following 3 lengths form a triangle? 9 inches, 4 inches, and 6 inches. 

• Yes
• No 

Do the following measurements for a triangle? 5 millimeters, 1 milometer, and 10 millimeters. 

• Yes
• No 

The sum of the length of any two sides of a triangle is __________ than the length of the third side. 

• equal
• less
• greater 
• exactly 90 degrees more.