Coordinate geometry

Question 1

And what do u use here?

Answer 1

y = mx + c

(m = mid point/gradient)

Question 2

How to find gradient?

Answer 2

e.g. A (3, 2) & B (5, 1)
Gradient = 1-2/5-3 = -1/2

In other words
Gradient = y2 - y1/x2 - x1

Question 3

How to find if points perpendicular?

Answer 3

M1 x M2 = -1 <– must equal -1

Question 4

What does it mean if it’s perpendicular tho?

Answer 4

90 degrees to each other.
Both points 90 degrees to each other.
Right angle….

Question 5

How to find if both points parallel?

Answer 5

They have to be the same gradient

Question 6

But what does it mean if it’s parallel?

Answer 6

Lines side by side of each other.
Not really touching like them perpendiculars.
… or not?

Question 7

How to find distance between both points?

Answer 7

[(x2 - x1)^2 + (y2 - y1)^2] [] = square root

Question 8

How to find mid point tho?

Answer 8

(x2 + x1)/2 <— X
(y2 + y1)/2 <— Y

Question 9

Remember the question where u put it in form of:
ax + by + c = 0
(which is after u gain their m.ps, gradients, find out if they parallel or perpendicular, or distance?, or the equation)

What must u be aware of?

Answer 9

No fractions in it.

Question 10

How to find equation of 2 points?

Answer 10

y - y₁ = m(x - x₁)

m = gradient

Question 11

Finding equation of 2 points, what to be aware of?

Answer 11

The gradient shall not have a fraction therefore u times it on both sides