The total length around a regular 7-sided polygon is 63 cm. If the length of each side is increased by 2 cm, what will be the new total boundary length?
Show answer & explanation
Correct answer: C
Explanation
Perimeter of a regular 7-sided polygon = 63 cm
Length of each side = 63 / 7= 9 cm
Upon increasing each side by 2 cm,
New side = 9 + 2 = 11 cm
New perimeter = 7 × 11 = 77 cm