Each student creates a pantograph lilke the one used in Hands-on-Lab 5-6A, page 214. The dimension of each student's pantograph should not, however, be the same.

Use your pantograph to draw a triangle and its enlargement. Measure and label the sides of each triangle. Set up the ratio for the measures of each pair of matching sides. Compare each ratio. Then compare your results with those of your partner. Discuss any similarities or differences in your results.

Follow the same procedure for a rectangle and a square. What do you notice about these ratios? Discuss your results with your partner. Then, predict the dimensions of a triangle with sides measuring 3 centimeters, 4 centimeters, and 5 centimeters after it is dilated using each of your group's pantograph's. Then check your prediction using each pantograph to the triangle.