in a classroom, 4 friends are seated at points A, B, C, and D as shown in FIG .7.8. Champa and chameli walk into the class and after observing for a few minutes Champa asks chameli ''don't you think ABCD is a square?'' chameli disagrees .using the distance formula, find which of them is correct.
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Step-by-step explanation:
According to the fig. A(3,4),B(6,7),C(9,4) and D(6,1) are the position of 4 friends .
If we join all these points then
By using distance formula
=(x2−x1)2+(y2−y1)2
AB=(3−6)2+(4−7)2=(−3)2+(−3)2=9+9=18=32
BC=(6−9)2+(7−4)2=(−3)2+(3)2=9+9=18=32
CB=(9−6)2+(4−1)
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