Prove : The perpendicular distance from a point P(x1,y1) to the straight line whose equation is Ax + By + c = 0 is
d = absolute value (Ax1 + By1 + c) / square root (A² + B²)
Also another problem not related to geometry is this :
When an integer is divided by 15, the remainder is 7. Find the remainders when the same integer is divided by 3 and 5.
Thanks in advance!
naturewild, I shall attempt the second problem first.
When an integer is divided by 15, the remainder is 7.
Therefore, the number is of the form 15n+7, where n is a certain Natural number. When 15n+7 is divided by 5, since 15n is divisible by 5, the remainder is what it would be when 7 is divided by 5, hence, the remainder is 2.When 15n+7 is divided by 3, since 15n is divisible by 3, the remainder is what it would be when 7 is divided by 3, hence the remainder is 1.
It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
Thanks for the solution to the second problem. Your coloring makes it so easy to understand.
Thanks once again ^^
Actually I have one more problem I'm stuck with, but I'm satisfied with only these 2 solutions ^_^