A worksheet to get students doing trigonometry before they've been taught it. First, recap similarity and get students measuring 30° triangles to find the opposite/hypotenuse ratio, then extend this to 40° and 60° triangles to get the beginnings of a table of trigonometric ratios. Then use this worksheet to practice selecting and using these few ratios.
Further extension questions: What do you think the ratio would be for 50°? How about 70°? (hint: plot a graph) What happens at 90°?
Further extension questions: What do you think the ratio would be for 50°? How about 70°? (hint: plot a graph) What happens at 90°?
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