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| 1. |
Check whether (5,-2) , (6,-4) and (7,-2) are coordinates of an isosceles triangle |
| Answer» Let a be (5,_2)&b be (6,_4)and c (7,_2).Distance between A and B=root under (6_5)^2+(_4+2)^2Root under1+4=root under5.Distance between A and C=root under (7_5)^2+(_2+2)^2=root under4=2.Distance between B and C=root under (7_6)^2+(_2+4)^2= root under1+ 4= root under5.Hence distance of AB=distance of BC=root 5 | |