Year 1 Lesson 23 Homework - Page 2

You are given 3 points (A, B and C) for each shape.
The points given go clockwise (↷) around the figure with D being the next point after point C.
  1. Plot these points.
  2. Find the offset of point A from point B in X and Y.
    (Subtract the X and Y coordinates of B from A. This is A minus B)
  3. Apply these offsets to point C to determine point D
  4. Plot your new point D and draw the shape.
    Does it look like the shape you want?
(These are problems from the indicated WSMC Math Olympiads ... slightly modified)

Problem 9:Problem 10:
2010: Rhombus
A (4,0)    B (6,4)    C (2,6)
Offset of point A from point B:
dX = _____   dY = _____

Point D = (____,____)
Reasonableness check:
    Does it look like a rhombus? _____ 		2008: Rectangle
A (1,-1)     B (-2,2)     C (-1,3)
Offset of point A from point B:
dX = _____   dY = _____

Point D = (____,____)
Reasonableness check:
    Does it look like a rectangle? _____