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Do Now 2/22/10

Do Now 2/22/10. Take out your HW from last week. Text p. 285, #1-10 all Copy HW in your planner. Text p. 291, #8-20 all Review “Geometry NJASK7 Prep” assignment on MySkillsTutor – Quiz Friday Be ready to copy POTW #4. “Basic Geometry Concepts”. Point. position in space

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Do Now 2/22/10

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  1. Do Now 2/22/10 • Take out your HW from last week. • Text p. 285, #1-10 all • Copy HW in your planner. • Text p. 291, #8-20 all • Review “Geometry NJASK7 Prep” assignment on MySkillsTutor – Quiz Friday • Be ready to copy POTW #4.

  2. “Basic Geometry Concepts” Point position in space represented by a dot. L A D Z K

  3. Plane a flat surface that extends on forever in all directions. How many planes on this figure?

  4. Line segment part of a line with 2 endpoints and all the points in between. D E C F

  5. Line a straight path extending without end in 2 directions. R S T

  6. Ray Part of a line that begins at a point and extends in one direction without ending. B K A J AB K JK A

  7. Congruent Two line segments are congruent when they are the same length. C D E F 3

  8. Angle Two rays that begin at the same point. D Sides C Vertex E

  9. Naming Angles • The following angle can be named in three ways: B C A Vertex

  10. Objective • SWBAT identify similar and congruent figures

  11. 1) M, N, P, R, S 2) 3) plane Y and plane Z 4) 5) 6) 7) quadrilateral DEFG 8) 9) 10) HomeworkText p. 286, #1-10 all

  12. Section 6.4 “Similar and Congruent Figures” Properties of similar figures: 1). Corresponding angles are congruent 2). Corresponding sides are proportional (equal ratios)

  13. Corresponding angles – matched angles of two figures When 2 angles have the same measure, they are marked with the same symbol. D A F E C B

  14. Corresponding sides – matched sides of two figures D A F E C B

  15. Given ABC ~ XYZ, name the corresponding angles and corresponding sides. Z A X Y Sides Angles B C

  16. Given ABC ~ DEF, find the ratio of the lengths of the corresponding sides. D 40 A 20 F E 32 35 16 The ratio of the lengths of the corresponding sides is 4/5. B C 28

  17. Given ABC ~ DEF, find the ratio of the lengths of the corresponding sides. D 7.5 A 6 F E 5 4.5 4 The ratio of the lengths of the corresponding sides is 2/3. B C 3

  18. Properties of congruent figures: 1). Corresponding angles are congruent 2). Corresponding sides are congruent

  19. Given , find the indicated measure. Z A X 15 45 20 45 Y 35° 15 B C 90° 35° 55°

  20. Homework Text p. 291, #8-20 all

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