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Find exact side lengths using 30°, 45° and 60°

10th grade (Year 11 in England) · 16 questions · Common Core: HSG.SRT.C.6, HSG.SRT.C.8 · England: GCSE Higher Geometry

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  1. Question 1

    An equilateral triangle has sides of 16 cm. Find its exact height.

    Answer

  2. Question 2

    A right triangle has hypotenuse 6 cm and a 60° angle. Find the side adjacent to the 60° angle. Give an exact answer.

    Answer

  3. Question 3

    An equilateral triangle has sides of 6 cm. Find its exact height.

    Answer

  4. Question 4

    A right triangle has hypotenuse 4 cm and a 60° angle. Find the side adjacent to the 60° angle. Give an exact answer.

    Answer

  5. Question 5

    An equilateral triangle has sides of 14 cm. Find its exact height.

    Answer

  6. Question 6

    A right triangle has two equal sides of 6 cm and a 45° angle. Find the hypotenuse. Give an exact answer.

    Answer

  7. Question 7

    An equilateral triangle has sides of 4 cm. Find its exact height.

    Answer

  8. Question 8

    A right triangle has hypotenuse 12 cm and a 30° angle. Find the side opposite the 30° angle. Give an exact answer.

    Answer

  9. Question 9

    An equilateral triangle has sides of 18 cm. Find its exact height.

    Answer

  10. Question 10

    A right triangle has two equal sides of 7 cm and a 45° angle. Find the hypotenuse. Give an exact answer.

    Answer

  11. Question 11

    An equilateral triangle has sides of 8 cm. Find its exact height.

    Answer

  12. Question 12

    A right triangle has the side adjacent to a 60° angle equal to 7 cm. Find the side opposite the 60° angle. Give an exact answer.

    Answer

  13. Question 13

    An equilateral triangle has sides of 18 cm. Find its exact height.

    Answer

  14. Question 14

    A right triangle has hypotenuse 6 cm and a 30° angle. Find the side opposite the 30° angle. Give an exact answer.

    Answer

  15. Question 15

    An equilateral triangle has sides of 8 cm. Find its exact height.

    Answer

  16. Question 16

    A right triangle has hypotenuse 18 cm and a 30° angle. Find the side opposite the 30° angle. Give an exact answer.

    Answer

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Answer key: Find exact side lengths using 30°, 45° and 60°

  1. 1. 8√3

  2. 2. 3

  3. 3. 3√3

  4. 4. 2

  5. 5. 7√3

  6. 6. 6√2

  7. 7. 2√3

  8. 8. 6

  9. 9. 9√3

  10. 10. 7√2

  11. 11. 4√3

  12. 12. 7√3

  13. 13. 9√3

  14. 14. 3

  15. 15. 4√3

  16. 16. 9