What is the area of the triangle formed by points (0,0),

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(x₁, y₁) = 0, 0, ( x₂, y₂) = (3, 4), (x₃, y₃) = (4, 3)

Area of ∆OAB =		x₁(y₂ - y₃) + x₂(y₃ - y₁) + x₃(y₁ - y₂)
		2

=		0(4 - 3) + 3(3 - 0) + 4(0 - 4)
		2

=		9 - 16		=	7	sq. units
		2			2

7	units²
2

5	units²
2

5	units²
3