Triangle Review

Which of the following side lengths form a triangle?

• 1, 2, 3

• 5, 7, 8

• 6, 6, 14

• 80, 20, 50

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

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

• 6 cm
• 11 cm
• 3 cm
• 2 cm
• 12 cm

Do the following measurements form a triangle? 65 mm, 32 mm, 33 mm

• Yes

• No

• Not enough information to tell

• Triangles aren't real shapes

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What is the name of this kind of triangle?

• Right
• Isosceles
• Scalene
• Equilateral

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What is the name of this kind of triangle?

• Right
• Scalene
• Isosceles
• Equilateral

What kind of triangle is this?

• Acute
• Right
• Sparkly
• Obtuse

Find the missing angle. 

• 151
• 147
• 118
• 62

Classify by its angles.

• acute
• equiangular
• right
• obtuse

Which would be the best classification for the triangle shown?

• right isosceles
• obtuse scalene
• obtuse isosceles
• acute scalene