6th Grade Math Unit 9 Review: Geometry

Find the missing angle measure for each triangle. 6. Triangle with angles 65°, 65°, and x°.

• x = 50°

• x = 60°

• x = 70°

• x = 80°

Find the missing angle measure for each triangle. 7. Right triangle with angles 38.9°, 90°, and x°.

• x = 51.1°

• x = 45°

• x = 60°

• x = 50°

Find the missing angle measure for each triangle. 8. Triangle with angles 22.1°, 140.2°, and x°.

• x = 17.7°

• x = 18.7°

• x = 19.7°

• x = 20.7°

Find the missing angle measure for each triangle. 9. 85°, 14°, and x°.

• x = 81°

• x = 75°

• x = 80°

• x = 82°

Find the missing angle measure for each triangle. 10. 25°, 101°, and x°.

• x = 54°

• x = 45°

• x = 55°

• x = 60°

Find the missing angle measure for each triangle. 11. 45°, 41°, and x°.

• x = 94°

• x = 85°

• x = 100°

• x = 90°

Find the missing angle measure for each triangle. 12. 18.1°, 62.4°, and x°.

• x = 99.5°

• x = 100.5°

• x = 98.5°

• x = 97.5°

Find the missing angle measure for each triangle. 13. 36.4°, 70°, and x°.

• x = 73.6°

• x = 72°

• x = 75°

• x = 74.5°

Determine if the three side lengths listed can form a triangle. Answer Yes or No, and explain your reasoning. 5.7 cm, 6 cm, 20 cm. Can these side lengths form a triangle?

• Yes

• No

Determine if the three side lengths listed can form a triangle. Answer Yes or No, and explain your reasoning. 13 in, 14 in, 15 in. Can these side lengths form a triangle?

• Yes

• No