86 and 87 utilize the Pythagorean theorem. Where those tangent lines meet the circle forms a right angle. So you have a side length of 6 and a hypotenuse of 22. So the missing side length is 21.16. For 87, its the same thing, but you have the 2 legs but are missing the hypotenuse.
Answer:
The answer is
<h2>

</h2>
Step-by-step explanation:
The distance between two points can be found by using the formula
<h3>

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where
(x1 , y1) and (x2 , y2) are the points
From the question the points are
E(-3,4) and B(-1,6)
The distance between them is
<h3>

</h3>
We have the final answer as
<h3>

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Hope this helps you
Step-by-step explanation:
36
squaring on both side
36 root is 6
6*6=36
[√6]2
cut root and square
answer 6
Answer:
15
Step-by-step explanation:
Scale Factor = 3
Using Formula:
Scale Factor = LengthOfDilatedTraingle/LengthOfActualTriangle
Scale Factor = B'C'/B'C'
B'C' = 3 * 5
B'C' = 15