Question

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

Answer 1

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

Answer 2

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 )