Answer:
78.5 or 78 1/2 units
Step-by-step explanation:
The formula for the area of a circle using diameter is 1/4*pi.*d to the second power. Plug it in, and you get 78.5 or 78 1/2 units.
Because 21 is more than 1
Answer:
The area of the figure is 28 units².
Step-by-step explanation:
Find the area of the full rectangle, ignoring the triangle.

Then, find the area of the triangle:

Finally, subtract:

Answer:
a=1/2
Step-by-step explanation: