1. Day 10: Review Unit 3: Coordinate Geometry
Did you know that birds need gravity to swallow?

2. Remember… Skills needed:
Length of a line segment 𝐷= 𝑥 2 − 𝑥 𝑦 2 − 𝑦 1 2
Midpoint of a line segment 𝑀= 𝑥 1 + 𝑥 2 2 , 𝑦 1 + 𝑦 2 2
Slope 𝑚= 𝑦 2 − 𝑦 1 𝑥 2 − 𝑥 1
Perpendicular slope = negative reciprocal

3. Study The Steps For Finding The…
Median
Altitude
Perpendicular bisector
Centroid (medians)
Circumcentre (perpendicular bisectors)
Orthocentre (altitudes)
Shortest distance from a point to a line

4. Test Hints

5. Matching (Equations) Slope Midpoint Parallel lines/perpendicular lines
Distance from origin
Distance between any two points
Circle
Horizontal/vertical line
Slope/𝑦-intercept form

6. Circle Questions Radius from equation, sketch, intercepts
Write equation given diameter

7. Line Segment Questions
Length of a line segment
Find endpoint given endpoint and midpoint
Shortest distance from a point to a line

8. Medians, Altitudes and Perpendicular Bisectors
Find one of them given the triangle

9. Centroids, Circumcentres, and Orthocentres
Explain (in words) how you would find one of them
Find one of them

10. To Do… Review Worksheet
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