The area of a circle is 153.86 square meters. What is the diameter of a circle?

7.8 (when I calculated I rounded to tenths so the actual answer might be a little bit different)

Step-by-step explanation:

the area of a circle is radius squared so

153.86= radius squared

sqaure root both sides and you get 12.4 =radius

divide both sides by pi and you get 3.9 which is the radius

the diameter is double the radius which is 3.9 *2 which is  7.8 :) hope this helped.

8+10

step-by-step explanation:

you multiply 4 by 2 and 5 by 2

6(h+1)/2=a

a=area

step-by-step explanation:

its the same thing as a square or rectangle but after multiplying two sides you need to divide it by two.