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3 years ago

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

Mathematics

2 answers:

ad-work [718]3 years ago

8 0

Answer:

The perimeter is 127.1 cm

Step-by-step 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

Ghella [55]3 years ago

6 0

Answer:

Step-by-step 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 )

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