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Acc Math 1 March 16 th

Acc Math 1 March 16 th. A. A. B. B. E. E. D. D. C. C. Turn in homework WARM-UP ABCD is a RHOMBUS 1. If What is the measure of ? 2. In the parallelogram  If AC = 18, what is BE? . Check homework – p.16. Trapezoid 4

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Acc Math 1 March 16 th

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  1. Acc Math 1 March 16th A A B B E E D D C C • Turn in homework WARM-UP ABCD is a RHOMBUS 1. If What is the measure of ? 2. In the parallelogram  If AC = 18, what is BE?

  2. Check homework – p.16 • Trapezoid • 4 • Quadrilateral or parallelogram; congruent • Parallelogram • Quadrilateral • 4 right angles • 7 • 78 • 78 • 102 • 44 • 59 • 2.4 • 16.8 • 33.6 • 16.8 • 16.8 • 33.6 • Rhombus • T • T • Kite or square

  3. Trapezoids

  4. Trapezoids *They have only one pair of opposite sides that are parallel base leg leg base

  5. B C E F A D The MEDIAN connects the midpoints of the legs

  6. Median Theorem for Trapezoids parallel to each base and its length is the average of the lengths of the bases

  7. EXAMPLE 1 EF is the median of trapezoid ABCD. Find EF. 22 in. A B E F C D 10 in.

  8. EXAMPLE 2 BC is the median of trapezoid MATH. Find MA. A M 15 in. B C T H 22 in.

  9. EXAMPLE 3 BC is the median of trapezoid TRAP. Find TR. T R 19 in. B C P 11 in. A

  10. If the legs are congruent then the trapezoid is ISOSCELES

  11. If a trapezoid is isosceles then each pair of base angles is congruent

  12. If a trapezoid is isosceles then its diagonals are congruent

  13. M A H T EXAMPLE 4 Find the missing angle measures in trapezoid MATH. 60°

  14. Assignment • Complete pages 17 and 18 • Pages 19-20 – Extra Credit

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