Answer: Top box : 10 Ft. , Side box: 21 Ft. , Area: 510 Ft^2, Perimeter: 98 Ft.
Explanation:
- Think about it as two shapes. A smaller rectangle that the sheep is in and a larger one with the rest of the pen. Doing this visually will help.
Top box:
20-10 = 10
- We minus 10 feet from 200 because we are dealing with the 'smaller' shape first, to find the length of its missing side we must subtract the known lengths; we removed the excess.
Side box:
28-9=21
- We do this because 28 Ft was a whole length from end to end when we only need the bigger shape, hence we remove the excess which is 9 Ft.
Area:
-Now we know all our lengths, deal with the two self-allocated 'shapes' as you would normally.
10 x 9 = 90. (Smaller shape.)
20 x 21 = 420. (Larger shape.)
- Then we add them to find the area of the WHOLE shape combined.
90 + 420 = 410 FT²
Perimeter:
- Once again, we know all our lengths and simply add them all together.
10 + 28 + 20 + 21 + 10 + 9 = 98 FT
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