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Find the area of triangle whose vertices...

Find the area of triangle whose vertices are (1,2), (3,4),(1/2,1/4).

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Area of triangle whose vertices are (1,2),(3,4),(1/2,1/4) is
`1/2[x_1(y_2-y_3)+x_2(y_2-y_1-y_2)]`
=`1/2abs(1(4-1/4)+3(1/4-2)+1/292-4)`,
`1/2abs(15/4-21/4-1 )=1/2abs((-10)/4),5/4 sq units.`
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