Pythagorean theorem in grade 9

We looked today at a quilt, and made a list of math questions we could solve about the quilt. We calculated area, volume, and perimeter, looked at the number of squares and number of triangles, we talked about types of triangles, and angles. We converted measurements from imperial to metric, and then worked together to figure out how long the diagonal would be.

We looked at pythagorean theorem, and watched the video that shows the area method of solving.

We can use this method to help us solve for any missing side, the hypotenuse or the legs (cathètes).

We check that our answer makes sense…the hypotenuse should always be the longest side.