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The area of the triangle whose vertices are (1, 2), (-4, -3) and (4, 1) is:

A7 sq. units
B20 sq. units
C14 sq. units
D10 sq. units
Answer & Solution
Correct answer: D. 10 sq. units
1. Area = (1/2)|x1(y2-y3) + x2(y3-y1) + x3(y1-y2)|. 2. = (1/2)|1(-3-1) + (-4)(1-2) + 4(2-(-3))| = (1/2)|-4 + 4 + 20|. 3. = (1/2)(20) = 10 sq. units. _Source: RRB Group D CEN-02/2018 PYQ, Q.19._
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