Alex: “I noticed that when I multiplied by
Maria: “I remember that when we were dilating shapes in Lesson 4.3.1, my shape got bigger when I divided by
Look at each student’s work. Why do both multiplying by
and dividing by make the triangles larger?
Since we know that multiplication and division are opposite operations, how can we explain why this happens?
Consider what happens when you multiply a shape by a number less than
; the shape becomes smaller.
On the other hand, dividing by a number larger than
will also cause a shape to become smaller.
Are the two expressions above any different?
Use Alex and Maria’s strategy to write two expressions to find the value of
in problem 4-98.
Try using the same factors as Alex and Maria to multiply or divide by the appropriate side length to find the value of
. Refer to Problem 6-94 for help.
Use the side length
as the multiple or divisor.