Algebra1 Glencoe CCSS Edition page 21 problem 51

Question

A regular octagon measures (3x + 5) units on each side. What is the perimeter if x = 2?

Answer 1

Step:1

Side length of the Octagon is .

Octagon has 8 equal sides, so perimeter of the octagon is .

Step:2

                    (Substitution: )

                       (Multiply: )

                            (Add: )

                                  (Multiply: )

Solution:

The perimeter of the octagon is 88 units.