Lengths That Make a Triangle

Will the side lengths 6, 8, 11 make a triangle?

• Yes

• No

Will the side lengths 5, 6, 12 make a triangle?

• Yes

• No

Can the sides of a triangle have lengths 3, 4, and 9?

• Yes

• No

What is a possible third side to a triangle with side lengths of 13 and 4?

• 9

• 12

• 8

• 5

Find the missing length.

• 9

• 18

• 4.5

• 16

• m∠C < m∠E
• m∠E > m∠D
• m∠D < m∠C
• m∠E > m ∠C

Find sides AB

Each of the sails on Joshua’s sailboat forms a triangle. The side lengths of one sail are 13, 17, and 20. What is the measure of each side of the sail?

• XY = 13, XZ = 20, YZ = 17

• XY = 17, XZ = 13, YZ = 20

• XY = 20, XZ = 17, YZ = 13

• XY = 13, XZ = 17, YZ = 20

Find DC

Find the length of AB

• 6

• 11

• 17

• 68