Straight Line

Question 1

Median
example
if c is the middle

Answer 1

midpoint (two opposites)
example - a&b

gradient (midpoint and other)
example - (6,6) and c

equation

Question 2

Altitude
example
the altitude of c

Answer 2

Gradient
example - a&b

m1 x m2 = -1
example - gradient

equation
example c

Question 3

Perpendicular Bisector

Answer 3

gradient

m1 x m2 = -1

midpoint (a,b)

equation (midpoint)(m1 x m2)

Question 4

m=tan0

to find the angle

Answer 4

rearrange equation to y = mx + c
tan0 = ans to previous step

Question 5

midpoint

Answer 5

(x1 + x2/2) , (y1 +y2/2)

Question 6

Perpendicular lines

Answer 6

m1 x m2 = -1
flip, change sign

Question 7

collinearity

Answer 7

1. find gradient
2. Statement - Since Mab = Mbc and they share a common point b, the points a,b,c are collinear.