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Geometry 1.8

Geometry 1.8. Brett Solberg – Alta High ‘11-’12. Warm-up. Quiz. Put way everything except your notes and a pencil. Move your desks so you’re spread out. Today’s Agenda. Distance Formula Midpoint Formula. 1-D Distance. Formula for finding distance on the number line:

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Geometry 1.8

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  1. Geometry 1.8 Brett Solberg – Alta High ‘11-’12

  2. Warm-up

  3. Quiz • Put way everything except your notes and a pencil. • Move your desks so you’re spread out.

  4. Today’s Agenda • Distance Formula • Midpoint Formula

  5. 1-D Distance • Formula for finding distance on the number line: |a – b| a, b numbers a is the smaller number Distance AB = |-7 - -4| = |-7 + 4| = |-3| = 3

  6. 2-D Distance • What is the distance between these two points?

  7. Distance Formula • d = • (-2, 1) (1, 5) • (x1, y1) (x2, y2) • d = • d = • d = = = 5

  8. Example 1 • d = • S(-2, 6) R(6, -2) • (x1, y1) (x2, y2) • d = • d = • d = = = 8

  9. Midpoint Formula A(8, 9) B(-6, -3) (x1, y1) (x2, x2) M = (1, 3)

  10. Quadrilateral • Find Perimeter • Quadrilateral

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