Classifying Triangles and Triangle Inequality Theorem

Does a triangle with these side lengths exist?

15, 12, 9

• Yes

• No

Does a triangle with these side lengths exist?

• Yes

• No

What is the " Triangle Inequality Theorem"?

• The sum of 2 sides is > the 3rd side

• The lengths of a triangle's sides are all the same

• The sum of 2 angles is < the 3rd angle

• I have no idea

Which of the following does not represent the lengths of the sides of a triangle?

• 2 cm, 6 cm, 7 cm

• 5 cm, 2 cm, 5 cm

• 5 cm, 5 cm, 8 cm

• 3 cm, 10 cm, 15 cm

What is the largest angle?

• J

• K

• L

When classifying a triangle by its sides, what type of triangle has two equal sides?

• equilateral triangle

• isosceles triangle

• scalene triangle

• none of the above

If two sides of a triangle measure 4 and 8, the third side could be: ______________.

• 9

• 3

• 4

• 1

List the angles in order from greatest to least.

• A, B, C

• B, C, A

• A, C, B

• B, A, C

Classify each triangle by its angles and sides.

• Acute, Isosceles

• Obtuse, Isosceles

• Right, Scalene

• Equiangular, Equilateral,

• Acute, Scalene

Classify each triangle by its angles and sides.

• Acute, Isosceles

• Obtuse, Isosceles

• Right, Scalene

• Equiangular, Equilateral,

• Acute, Scalene