Miles draws a triangle. Each side of Miles' triangle is 27 inches long. Marcy draws a square with 18-inch sides. What is the perimeter of Miles' and Marcy's polygons (shapes)?
The perimeter of Miles' triangle is _______ inches.
The perimeter of Marcy's square is _______ inches.
What is the difference in the perimeters of these two polygons?
The difference in perimeter of these two polygons is _______ inches.