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Mathematics, 01.12.2019 12:31 kinglightskin2k

The three sides of a triangle are tangent to a unique circle called the incircle. on the coordinate plane, the incircle of abc has its center at the origin. the lines whose equations are x+4y=6s(qrt17), 2x+(sqrt5)y=-18, and 2(sqrt2)x=y+18 contain the sides of abc. what is the length of the radius of the incircle?

sqrt= square root

a. 2 units
b. 3 units
c. 6 units
d. 8 units

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