Answer:
Semicircle radius is 4.5
Radius x radius x 3.14 = area of circle but you divide by 2
4.5 x 4.5 = 20.25 x 3.14 = 63.585/2=31.7925 for semicircle
To find the line for the triangle subtract 16 from the other side which is 8 so the triangle is 8 by 3.
8 x 3 = 24/2=12 for triangle
6 + 3 = 9 the missing side.
9 x 8 = 72 so the rectangle is 72
72 + 12 = 84 + 31.7925 = 115.7925 so that is the area
Circumference is the perimeter for the circle. 9 x 3.14 = 28.26
Perimeter of triangle is 19.544
8 + 9 = 17 x 2 = 34
28.26 + 34 = 62.26 + 19.544 = 81.804
Area is 115.7925 and perimeter is 81.804
Explanation: