Answer:
a. For the outside perimeter, as you can see, it consists of half-circle at the top and a rectangular below,
Perimeter = Perimeter of half circle + Perimeter of rectangular
= 2 x pi x 10/2 + (60 + 20) x 2 = 10pi + 160 = 191.42
b. Area of triangle 3 = base x height x 1/2 = 20 x 16/2 x 1/2 = 80
c. Area of rectangular 1 = length x width = (20/2) x width = 10 x width (here width is undefined).
d. Area of triangle 5 = base x height x 1.2 = 16 x 20/2 x 1/2 = 80
e. Area of half-circle 10 = Radius^2 x pi x 1/2 = 10^2 x pi x 1/2 = 50pi = 157.08
a, b, c, d, e are marked from top to bottom of table you need to fill in.
Hope this helps!
:)