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Darya [45]
4 years ago
7

Help me on number 21 please

Mathematics
1 answer:
Luda [366]4 years ago
6 0
The answer is C) 300 square feet
 The way I figured this out is because by having the diagonal it is the same as cutting a rectangle in half , it forms a triangle and by using the Pythagoras therom I found the left over side

The hypotenuse was 25 and one the sides was 20 
so...
25 ^ 2 - 20^2 = x ^2
625 - 400 = x^2
225 = x^2
15= x 

So now that I had one of the sides I took that and multiplied it by the base to find my area 
15 * 20 =300 
And that is how I got the answer 

I really hope everything I explained make sense 
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Step-by-step explanation:

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