Using rulers and protractors, we will analyze scale factors when dilating shapes. Participants will double and triple various triangles. Our discussion and activity will focus on the mathematics of similar figures including angle measures, scale factors, and algebraic rules that can be used to predict how the figures are affected.
Nivens, Ryan Andrew; and Combs, Emily. 2015. Dilating Triangles!. Workshop presentation. Regional Meeting of the National Council of Teachers of Mathematics (NCTM), Nashville, TN. https://nctm.confex.com/nctm/2015TN/webprogram/Session34923.html