Yes. Use pythagorean theorem to find that: 9^2 + 12^2 =225 and 15^2 =225.
I’m pretty sure it 9 13/20
Answer:
7. A = π
8. A = 6.25π
9. A = 16π
Step-by-step explanation:
When you have a bunch of similar problems that all use the same formula, it is usually convenient to solve the problem in generic terms, then put in the specific numbers.
You are asked to find A, and you are given the formula ...
To rewrite this as an equation for A, you divide by its coefficient, 4π.
If you like, you can go one step further, replacing C with kπ. Now, you have ...
__
7. k=2, A=(2^2)/4·π
A = π
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8. k=5, A=(5^2)/4·π
A = (25/4)π
A = 6.25π
__
9. k=8, A=(8^2)/4·π
A = 16π
This is called the Pythagorean theorem : a ² + b ² = c ². You can substitute any of the variable with any of the known numbers and then you all you have to do is isolate the variable. I hope that helps!!
Tbh I’m doing this for for the brainly points i apoligse