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Are two triangles similar? Compare angles

Year 9 maths · Fieldbook Learning

Name ______________________ Date __________

Triangles are similar if their angles match. Find each third angle first. Write yes or no.

  1. Triangle 1 has angles of 67° and 33°. Triangle 2 has angles of 80° and 33°. Are the triangles similar? Write yes or no.
  2. Triangle 1 has angles of 30° and 27°. Triangle 2 has angles of 123° and 27°. Are the triangles similar? Write yes or no.
  3. Triangle 1 has angles of 75° and 25°. Triangle 2 has angles of 119° and 25°. Are the triangles similar? Write yes or no.
  4. Triangle 1 has angles of 38° and 54°. Triangle 2 has angles of 38° and 54°. Are the triangles similar? Write yes or no.
  5. Triangle 1 has angles of 28° and 36°. Triangle 2 has angles of 116° and 28°. Are the triangles similar? Write yes or no.
  6. Triangle 1 has angles of 80° and 78°. Triangle 2 has angles of 80° and 78°. Are the triangles similar? Write yes or no.
  7. Triangle 1 has angles of 96° and 44°. Triangle 2 has angles of 96° and 44°. Are the triangles similar? Write yes or no.
  8. Triangle 1 has angles of 105° and 42°. Triangle 2 has angles of 22° and 42°. Are the triangles similar? Write yes or no.
  9. Triangle 1 has angles of 70° and 75°. Triangle 2 has angles of 75° and 35°. Are the triangles similar? Write yes or no.
  10. Triangle 1 has angles of 73° and 59°. Triangle 2 has angles of 48° and 59°. Are the triangles similar? Write yes or no.
  11. Triangle 1 has angles of 45° and 63°. Triangle 2 has angles of 33° and 63°. Are the triangles similar? Write yes or no.
  12. Triangle 1 has angles of 110° and 34°. Triangle 2 has angles of 110° and 34°. Are the triangles similar? Write yes or no.
  13. Triangle 1 has angles of 91° and 42°. Triangle 2 has angles of 47° and 91°. Are the triangles similar? Write yes or no.
  14. Triangle 1 has angles of 55° and 102°. Triangle 2 has angles of 14° and 102°. Are the triangles similar? Write yes or no.
  15. Triangle 1 has angles of 64° and 63°. Triangle 2 has angles of 64° and 63°. Are the triangles similar? Write yes or no.
  16. Triangle 1 has angles of 110° and 55°. Triangle 2 has angles of 110° and 55°. Are the triangles similar? Write yes or no.
  17. Triangle 1 has angles of 56° and 97°. Triangle 2 has angles of 56° and 97°. Are the triangles similar? Write yes or no.
  18. Triangle 1 has angles of 88° and 12°. Triangle 2 has angles of 80° and 12°. Are the triangles similar? Write yes or no.
  19. Triangle 1 has angles of 46° and 70°. Triangle 2 has angles of 46° and 70°. Are the triangles similar? Write yes or no.
  20. Triangle 1 has angles of 81° and 38°. Triangle 2 has angles of 19° and 38°. Are the triangles similar? Write yes or no.
More free practice: fieldbooklearning.com/uk/practice/year-9/are-two-triangles-similar-compare-angles/

Answer key: Are two triangles similar? Compare angles

  1. yes
  2. yes
  3. no
  4. yes
  5. yes
  6. yes
  7. yes
  8. no
  9. yes
  10. yes
  11. no
  12. yes
  13. yes
  14. no
  15. yes
  16. yes
  17. yes
  18. yes
  19. yes
  20. no