Question 107159
the formula for the area of a circle is {{{pi*r^2}}}
r is your radius, which is half your diameter
r=3

3.14*3^2
=3.14*9
=28.36meters squared

2 
area of a triangle is 0.5*base*height
=0.5*7*22
=77ft^2

3
x-18=23
x=23+18
x=41

the number is 41