Classify Triangles, Triangle Sum Theorem, Triangle Inequality Theorem

Does a triangle with these side lengths exist?

20, 10, 9

• Yes, only one

• No

• Yes, many

Does a triangle with these side lengths exist?

15, 12, 9

• Yes, only one

• No

• Yes, many

If 2 of the angles of a triangle are 30 and 70 degrees, the third angle measures...

• 80

• 100

• 60

• 90

Which type of triangle is pictured?

• Equilateral Triangle

• Right Isosceles Triangle

• Obtuse Scalene Triangle

• Obtuse Equilateral Triangle

What are the three types of Triangles if we classify them

By their SIDES?

• Big, Small, Medium

• Scalene, Isosceles, Equilateral

• Acute, Obtuse, Equiangular

• Tall, Short, Middle

All my angles and sides are equal. I am what triangle?

• Right Triangle

• Scalene Triangle

• Equilateral Triangle

• Isosceles Triangle

Which of these lengths CANNOT represent the sides of a triangle?

• 32, 34, 60

• 28, 30, 58

• 13, 20, 27

• 2, 4, 5

Can the following side measures form a triangle?
  4 cm, 7 cm, 10 cm 

• Yes

• No

What is the range of values of x for a triangle's third side given side measures of 8 and 15?

• between 8 and 15

• between 7 and 23

• less than 7, greater than 23

If the longest side of the triangle was 10. Then the two shorter sides must have a sum that is ....?

• any length

• equal to 10

• greater than 10

• less than 10