Triangle Inequality Theorem

Which of the following side lengths form a triangle?

• 1, 2, 3

• 5, 7, 8

• 6, 6, 14

• 80, 20, 50

Tags

CCSS.7.G.A.2

What is the range of possible third side measures using 10 and 15?

• 9 < x < 16

• 10 < x < 15

• 1 < x < 5

• 5 < x < 25

Tags

CCSS.7.G.A.2

Which of the following side measures make a triangle?

• 7, 9, 5

• 1, 3, 7

• 5, 8, 1

• 10, 10, 21

Tags

CCSS.7.G.A.2

Measurements of 4 cm, 7 cm, and ​ (a)   form a triangle

• 6 cm
• 11 cm
• 3 cm
• 2 cm
• 12 cm

Tags

CCSS.7.G.A.2

Measurements of 10 in, 18 in, and ​ (a)   form a triangle.

• 9 in
• 7 in
• 28 in
• 30 in
• 5 in

Tags

CCSS.7.G.A.2

Which of the following measures DO NOT form a triangle?

• 1, 1, 1

• 7, 7, 7

• 8, 10, 17

• 3, 4, 8

Tags

CCSS.7.G.A.2

Which of the following measures DO NOT make a triangle?

• 4, 5, 6

• 5, 5, 11

• 10, 10, 1

• 42, 21, 22

Tags

CCSS.7.G.A.2

Which of the following side measures DO NOT form a triangle

• 6, 3, 9

• 7, 3, 6

• 10, 19, 11

• 50, 50, 99

Tags

CCSS.7.G.A.2

Which of the following measures form a triangle?

• 1, 1, 3

• 5, 5, 12

• 7, 9, 16

• 6, 5, 6

Tags

CCSS.7.G.A.2

Which of the following side measures form a triangle?

• 50, 50, 102

• 25, 26, 52

• 45, 40, 75

• 21, 20, 43

Tags

CCSS.7.G.A.2