Select Record data, then drag each side and its opposite angle into the table.
Compare the ratios. Then change the triangle and start a new table.
Copy your tables into your notebook.
Students drag the corners of a triangle and record each side length with the angle opposite it. The data table works out the ratio for every row, so students can test triangle after triangle and find what stays the same. Use it on the board to launch the sine rule, or let students explore and record on their own devices.
Who it’s for
MYP years 4–5 (ages 14–16), standard and extended mathematics. Also a quick refresher at the start of the DP.
Branch of mathematics: spatial reasoning. Topics: trigonometry, sine rule, non-right-angled triangles, angles in triangles.
