Chapter 6 Flashcards
(8 cards)
1
Q
How do you work out the midpoint between 2 points?
A
Add x coordinate and divide by 2. Same with y.
2
Q
How do you work out the distance between 2 points?
A
Pythagoras’ theorem.
3
Q
What is the new equation of a line?
A
y-y1=m(x-x1)
4
Q
How can lines be parallel/perpendicular?
A
.Same gradient.
.Products of gradient is -1.
5
Q
What is the equation of a circle?
A
(x-a)^2+(y-b)^2 = r^2
6
Q
What are the 3 forms of intersection with a circle and a line?
A
.None, tangent, two.
7
Q
What is a tangent and a normal?
A
.Perpendicular to radius at point of contact.
.Line perpendicular to tangent at point of contact.
8
Q
What are the 5 possibilities of 2 circles intersecting?
A
.d > sum.
.d = sum.
.d > difference but < sum.
.d = difference.
.d < difference.
