Lesson 25 Triangle ratios

Worksheet 3 Sine ratios

Angle          Tangent      Opposite/Adjacent   Sine   Opposite/Hypotenuse
10
20
30
40
50
60
70
80

Now try these:

  • Can you estimate the sine ratio for 45°? You can check this by drawing and measuring.
  • If the hypotenuse in a 45° triangle is 12 cm, what should the opposite side be?
  • When you look at the table what do you notice?
  • What about angles below 10° and above 80°?

 

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Thinking Mathematics Lessons Copyright © by Michael Shayer and Mundher Adhami. All Rights Reserved.

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