Naming Triangles and Triangle Inequality

Classify this triangle by its sides and angles. 

• obtuse scalene

• equilateral equiangular

• right isosceles

• obtuse equilateral

Classify this triangle by its sides and angles. 

• right scalene

• obtuse equilateral

• right isosceles

• obtuse isosceles

Classify this triangle by its sides and angles. 

• right isosceles

• obtuse scalene

• equilateral equiangular

• obtuse isosceles

Classify this triangle by its sides and its angles. 

• obtuse scalene

• equilateral equiangular

• acute right

• right isosceles

Classify this triangle by its sides and angles. 

• obtuse scalene

• right isosceles

• obtuse isosceles

• acute isosceles

Classify this triangle by its sides and angles. 

• equilateral equiangular

• acute isosceles

• acute scalene

• right equilateral

What is a possible third side to a triangle with side lengths of 5 and 5?

• 9

• 10

• 11

• 12

Determine what type (if any) of a triangle would have the following side lengths:

4, 6, 7

• acute

• obtuse

• right

• not a triangle

Where would the shortest side of a triangle be located?

• Across from the smallest angle in the triangle.

• Across from the largest angle in the triangle?

• Cannot tell.

Determine what type (if any) of a triangle would have the following side lengths:

20, 21, 25

• acute

• obtuse

• right

• not a triangle