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Area and Perimeter : Trapezoids Keystone Geometry

Area and Perimeter : Trapezoids Keystone Geometry. The || sides are bases ; . the other sides are legs. 4. 3. 1. 2. D. C. Base angles:. &. m. N. M. b 2. B. A. Review of Trapezoids. b 1. Trapezoid Median Theorem. C. D. A. B. E. F. are altitudes.

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Area and Perimeter : Trapezoids Keystone Geometry

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  1. Area and Perimeter: TrapezoidsKeystone Geometry

  2. The || sides arebases; the other sides are legs. 4 3 1 2 D C Base angles: & m N M b2 B A Review of Trapezoids b1 Trapezoid Median Theorem

  3. C D A B E F are altitudes Altitude & Height of a Trapezoid Def: An altitude of a trapezoid is any segment perpendicular to a line containing a base from a point on the opposite base. Def: The height of a trapezoid is the lengthof an altitude.

  4. b1 h Area of a Trapezoid: The area of a trapezoid is one half the product of the height & the sum of the bases. b2 Since Area of a Trapezoid

  5. 7 10 6 13 Examples 1. Find (a) the area of the trapezoid & (b) the length of its median.

  6. 6 5 5 10 2 2 6 by Pyth. Thm Examples 2. Find the area of an isosceles trapezoid with legs 5 & bases 6 & 10. h

  7. h s h h h b b b2 h h b b Summary A(square) = s2=bh A(rectangle) = bh A(||-gram) = bh b1 b A(triangle) = A(rhombus) = bh A(trapezoid) =

  8. Practice Examples 3. 1. 2. 6 10 15 6 6 60 60 5 18 10 8 5. 4. 6. 2 45 60 60 8 3 3 6 30 10 3

  9. Practice Examples (with Trigonometry) 9. 7. 8. 7 8 6 10 10 6 38 35 40 13

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