help please whice h i foreach is rih

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02-02-2018
Mathematics

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help please whice h i foreach is rih

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anchitthawi anchitthawi · Answer 1 · 2018-02-02T15:18:18+01:00

anchitthawi anchitthawi

02-02-2018

Triangle ABC is a "right" triangle and "scalene" (because no side is equal).

BC^2 = 1^2 + 2^2
(from B(-1,1) and C(0,-1) ; x=|xc-xb|= |0-(-1)| = 1 , y=|yc-yb|= |-1-1| =2)

BC^2 = 1+4
so the measure of BC = √5 ≈ 2.2

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