Question 1199600
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The distance formula you used to find the answers IS the Pythagorean Theorem....<br>
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added after student replied, saying the instructions were to find the answers using both the distance formula and the Pythagorean Theorem....<br>
In my opinion, those instructions are absurd.<br>
The Pythagorean Theorem says {{{a^2+b^2=c^2}}}<br>
The distance formula says {{{(x - x_0)^2 + (y - y_0)^2 = r^2}}}<br>
But {{{a=x-x_0}}} , {{{b=y-y_0}}} , and {{{c=r}}} ; so the two formulas are the same.  Whichever one you use, you are using the same numbers.<br>