straight line

Question 1

finding the perpendicular line

Answer 1

-put into correct form
- find perpendicular gradient
- feed in other point and new gradient into straight line eqn
y-b=m(x-a)

Question 2

finding a line with an angle

Answer 2

• m=tanΘ
• draw cast diagram and find related angle if non calc and draw triangles
• use y-b=m(x-a) with points provided

Question 3

finding missing point from an eqn and another full grid reference

Answer 3

• put given eqn in y=mx+c
• identify gradient
• use gradient formula to find missing point

Question 4

perp bisector

Answer 4

-midpoint. x1 + x2/2 ; y1 +y2/2
- find gradient and perb gradient
- feed all info into y-b=m(x-a)

Question 5

median

Answer 5

• midpoint
• gradient of mid and other point
• put into y-b=m(x-a)

Question 6

altitude

Answer 6

• find gradient
• find perp gradient
• put into y-b=m(x-a) with other point