mouz3Broosha mouz3Broosha

10-03-2017
Mathematics

contestada

A circle has its center at the origin, and (5, -12) is a point on the circle. How long is the radius of the circle?
5
12
13

Respuesta :

ghanami ghanami

10-03-2017

Hello here is a solution :
the radius of the circle is OA A(5;-12) and O (0;0)
OA=   square root ((5-0)² + (-12-0)²)
=   square root (25+144)
=   square root(169)
OA = 13

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