Answer:

Step-by-step explanation:
<em>Hey there!</em>
Well using the given ratio,
3:4
And the area of the small shape we need to do,
72*72 = 5184
Now we can make the following fractions,
= 
Now we can solve,
3*x = 3x
4 * 5184 = 20736
3x = 20736
20736 / 3
x = 6912
So the area of the bigger shape is 6912 units^2
<em>Hope this helps :)</em>
Answer:
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Answer:
the last one
Step-by-step explanation:
follow the lines in the order of the letters. look at each corner showering that the angle = 90°. the last option is the only one that proves that it is a right angle.
hope this helps
Answer: 21
Step-by-step explanation: Just plug in the numbers for x, and you get 21 when you plug that in.