Cartesian coordinates are named for René Descartes, whose invention of them in the 17th century revolutionized mathematics by allowing the expression of problems of geometry in terms of algebra and calculus.
COORDINATE GEOMETRY
Key questions
How do we find the equation of a straight line?
Can we find the midpoint of a line segment?
How do we find the length of a line segment?
What about parallel and perpendicular lines?
What is the equation of a circle?
How do we find the intersection of a line and circle?
How do we find the equation of a tangent to a circle?
Can we solve coordinate geometry problems?
5 lessons
Literacy
stories that set a frame or background
stories that accompany or intertwine
stories that introduce
stories that explain
stories that ask a question
stories that entertain
Introduce...
year 9 straight line resources - 1, 2, 3, 4
don squares and lines - 1, 3, 4, 8
midpoints - 2
parallel lines - 4
quadrilateral coordinates - 3, 8
stained glass - 1
Develop...
line segments - 1, 2, 3, 4
given two coordinates - 1, 2, 3, 4, 8
circle equation - 5, 8
circles, parabolas and lines - 1, 5, 6, 8
Extend...
3d coordinates - 8
coordinate geometry problems don - 1, 2, 3, 4, 8
harder coordinate geometry practice grid - 1, 2, 3, 4, 8
parabela - 1, 8
two tangents - 8