billyhunt1999 billyhunt1999

23-06-2017
Mathematics

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Circle O has a diameter AB. If A is at (-6, -2) and B is at (-3, 4) , find the length of the radius of the circle. 9.6 units 4.2 units 3.4 units 10.5 units

Respuesta :

mathmate mathmate

28-06-2017

Radius is half the distance AB
=(1/2)sqrt((y2-y1)^2+(x2-x1)^2)
=(1/2)sqrt(6^2+3^2)
=1/2sqrt(45)
=1.5sqrt(5)
=3.35

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