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CBSE Class 10 Answered

solve
Asked by Trisha Gupta | 03 Nov, 2021, 12:45: AM
Expert Answer
begin mathsize 16px style If space the space three space points space are space collinear space then space the space Area space of space straight a space triangle space is space zero.
We space have comma
Area space of space straight a space triangle space equals space 1 half open square brackets straight x subscript 1 open parentheses straight y subscript 2 minus straight y subscript 3 close parentheses plus straight x subscript 2 open parentheses straight y subscript 3 minus straight y subscript 1 close parentheses plus straight x subscript 3 open parentheses straight y subscript 1 minus straight y subscript 2 close parentheses close square brackets
rightwards double arrow 1 half open square brackets 3 open parentheses 6 minus 15 over 2 close parentheses plus straight m open parentheses 15 over 2 minus 5 close parentheses plus 1 half open parentheses 5 minus 6 close parentheses close square brackets equals 0
rightwards double arrow fraction numerator negative 9 over denominator 2 end fraction minus 15 over 2 straight m minus 1 half equals 0
rightwards double arrow negative 9 minus 15 straight m minus 1 equals 0
rightwards double arrow negative 15 straight m equals 10
rightwards double arrow straight m equals fraction numerator 10 over denominator negative 15 end fraction equals negative 2 over 3 end style
Answered by Yasmeen Khan | 03 Nov, 2021, 03:03: PM
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