Question

How do I do this? I need it in perimeter to 2 decimal places. Thank you!

Answer 1

Explanation:

do this in two parts. one, the rectangle, two, the circle

the rectangle , you only have 3 sides to the rectangle.

2 * 25 = 50

1* 30 = 30

total perimeter of the rectangle = 80 cm

the circle, find the total of the circle, then since there is only half and circle, multiply that by 1/2 or divide by 2, same thing.

perimeter of a circle is the circumference

circumference of a circle is 2
`\pi`r or diameter
`\pi` , same thing

30
`\pi` = 94.24777961 cm ( the whole circle )

1/2*94.24777961 =47.1238898 cm

add the two parts

80 + 47.1238898 = 127.1238898 cm

127.12 cm ( rounded to two decimal places )

Answer 2

The perimeter is 127.1 cm

Explanation:

30+25+25=80

(2)(3.14)(15)=94.2

94.2/2=47.1

Divide by two because of the semicircle

80+47.1=127.1