The product of the perpendiculars from a point (α, β) to the pair of lines ax2 + 2hxy + by2 = 0 is given by
The area of the triangle formed by ax2 + 2hxy + by2 = 0 and lx + my + n = 0 is given by
x | y | 1 | ||||
m1 | O | l1 | m1 | |||
m | n | l | m |
The line ax + by + c = 0 and the pair of lines (ax + by)2 – 3(bx – ay)2 = 0 form an equilateral triangle. Its area is given by sq. units