Be sure that you have done Exercise 49 first.
(a) Draw a sketch of a figure with five sides of equal length. Write a “shortcut” rule (a formula) for finding the perimeter of this shape.
(b) Draw a sketch of a figure with six sides of equal length. Write a formula for finding the perimeter of the shape.
(c) Write a formula for finding the perimeter of a shape with 10 sides of equal length.
(d) Write a formula for finding the perimeter of a shape with n sides of equal length.
49. In an equilateral triangle, all sides have the same length.
(a) Draw sketches of four different equilateral
(b) Write a “shortcut” rule (a formula) for finding the perimeter of an equilateral triangle.
(c) Will your formula work for other kinds of triangles that are not equilateral? Explain why or why not.
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