glau1373 glau1373

21-05-2021
Mathematics

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A diameter of a circle has endpoints at (3, -8) and (-5, -2). Find the radius of the circle.

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colinspurdle colinspurdle

21-05-2021

Answer: r = 5

Step-by-step explanation:

Using Pythagoras we can find the length of the diameter

d^2 = (3 - -5)^2 + (-8 - -2)^2

= 8^2 + (-6)^2

= 64 + 36

= 100

This means d = 10 and r = 5

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