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Geometry

This lesson covers the classification of points based on their coordinates and explores symmetry in coordinate geometry. It includes topics such as subsets of points, points with the same sign coordinates, points where y > x, and the midpoint formula.

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Geometry

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  1. Geometry Chapter 1

  2. B D C H E F A G b) those whose coordinate are both even ex # 1 Name the subset of points a) those whose coordinates have the same sign c) those where y > x A(0,0) B(2,1) C(-2,-1) D(3,-2) E(1,4) F(-2,3) G(-2,-4) H(4,-4)

  3. B D C H E F A G b) those whose coordinate are both even ex # 1 classify the points by a) those whose coordinates have the same sign c) those where y > x Plot the point A(0,0) B(2,1) C(-2,-1) D(3,-2) E(1,4) F(-2,3) G(-2,-4) H(4,-4)

  4. Congruent (

  5. Similar figures ( ~ ) figures that are the same shape, not necessarily same size.

  6. Scale Factor1/8” = 1’ 0” 32 ft Model or scale size is found by multiplying actual size by the scale factor. 32 × 1/8” = 4” 48 ft 48 feet is, 48/8” or 48 × 1/8” = 6”

  7. Assignment 13/ 13 – 20, 35 – 39 19/ 1 – 10, 25, 27, 28

  8. Lesson 1.4 Symmetry What is symmetry?

  9. Single Line Symmetry Multiple Line Symmetry

  10. Rotational Symmetry No Lines of Symmetry Rotational Symmetry – Object Can spin and fit on top of itself. This Case 180o

  11. Lesson 1.4 Symmetry Degrees of Rotation Number of coincident positions divided into 360 360 ÷ 8 = 45 What types of symmetry? 8 Lines 45o rotational

  12. Assign 25/ 9 – 12, 13 – 19 odd, 29 – 32, 33 – 39 odd Symmetry in Coordinate Geometry Midpoint of segment joining symmetrical points Symmetrical points are ( - 5, 1) and (-1, 1) What is the midpoint of line joining the points of symmetry? Midpoint Formula Ex. # 2 Find Midpoint (7, 4) and (1, -2) Midpoint (- 3, 1)

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