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What is Trigonometry?
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Trigonometry: Measuring with Triangles

Picture this: You want to know how tall a building is, but you can't climb it. Trigonometry lets you figure it out using just an angle and a distance! It connects sides and angles of triangles.

30°Adj = 129.9Opp = 75.0Hyp = 150
Angle30°
sin0.5
cos0.866
tan0.577

Key Points

  • 1
    Connects sides and angles of triangles
  • 2
    Used in building, maps, games, and space science
  • 3
    We focus on RIGHT triangles (one 90° angle)

Pro Tip

Same angle = same ratios, no matter how big or small the triangle!

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