Question

find the area of triangle formed by the point(2,1),(6,1) and (2,4)

Answer 1

↑ Here is your answer ↓ _____________________________________________________________ _____________________________________________________________

Area of a triangle

$= 1/2 [x_1(y_2-y_3) + x_2(y_3-y_1) + x_3(y_1-y_2)]$

$= 1/2 [2(1-4) + 6(4-1) + 2(1-1)]$

$= 1/2 [2(-3) + 6(3) + 2(0)]$

$=1/2 [-6 + 18]$

$=1/2 * 12$

$= 6u^2$