Question

For problems 5 – 8, find the perimeter of the following figures. (3 points each)

Answer 1

a is 132.8 m


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Answer 2

5. 132.8 m

6. 5 7/16 in

7. 5 37/63 yd

8. 27.376 m.

Explanation:

5) To find the perimeter of a rectangle, add up all of the sides.

Remember, in a rectangle, opposite sides are congruent.

`17.1 + 49.3 + 17.1 + 49.3 \\= 132.8`

The perimeter is 132.8 m.

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6) To find the perimeter of a pentagon, simply add up all of the sides.

`1(1)/(8) +1(1)/(8) +1(1)/(16) +1(1)/(16) +1(1)/(16) \\\\= 5 (7)/(16)`

The perimeter is 5 7/16 in.

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7) To find the perimeter of a circle, use this formula: π × d OR π × r × r

π = 22/7

r = 1 1/3

Since we know what each variable equals, we plug it into the formula, then solve from there.

π × r × r ➜ 22/7 × 1 1/3 × 1 1/3 = 5 37/63.

The perimeter is 5 37/63.

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8) To find the perimeter of a circle, use this formula: π × d OR π × r × r

π = 3.14

d = 8.4

Since we know what each variable equals, we plug it into the formula, then solve from there.

π × d ➜ 3.14 × 8.4

= 26.376

The perimeter is 26.376 m.