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Lecture on Properties of Quadrilaterals for Grade 8 - Assumption at CABT

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- 1. The session shall begin shortly…
- 2. Quadrilaterals Names A Math 8 Lecture
- 3. Quadrilaterals are polygons with four sides Quadrilaterals The sum of the measures of the angles of a quadrilateral is 360 degrees
- 4. Trapezium Trapezoid (kite) Parallelogram The Quadrilaterals Names Rhombus Square Rectangle
- 5. Quadrilaterals 2 pairs adjacent congruent sides 1 pair parallel sides 2 pairs parallel sides Trapezoid Parallelogram non-parallel sides are congruent 4 congruent sides 4 right angles Kite Isosceles Trapezoid Rhombus Rectangle Square
- 6. The Properties of Quadrilaterals
- 7. Trapezoid Trapezium Sides 1 pair of parallel sides no pair of parallel sides 2 pairs of parallel sides and opposite sides equal. Parallelogram Sides Rhombus 2 pairs of parallel sides and all sides equal. 2 pairs of parallel sides and all sides equal. Square 2 pairs of parallel sides and opposite sides equal. Rectangle
- 8. Trapezoid Kite One opposite pair of equal angles Opposite angles are equal. Parallelogram Angles Angles Rhombus Opposite angles are equal. All angles are right angles (90o) Square All angles are right angles (90o) Rectangle
- 9. Trapezoid Kite Diagonals cross at right angles Diago Diagonals nals Rhombus Diagonals bisect Parallelogram Diagonals equal Diagonals bisect Diagonals bisect at right angles Rectangle Square at right angles
- 10. Trapezoid Kite All Three Sides, angles and diagonals Rhombus Parallelogram Rectangle Square
- 11. Isosceles Trapezoid General Trapezoid One pair of equal sides and two pairs of equal angles. Sum of the angles is 360 degrees Right-angled Trapezoid Trape Angles of zium Trapezoids 1 Right-angled Trapezoid
- 12. Isosceles Trapezoid General Trapezoid Diagonals of equal length Right-angled Trapezoid Trape Diagonals zium 2 Right-angled Trapezoid
- 13. General Trapezoid The MEDIAN of a trapezoid is the line segment that joins the midpoints of the two non-parallel sides of the trapezoid. Median of a Trapezoid The length of the MEDIAN a trapezoid is the line segment that joins the midpoints of the two non-parallel sides of the trapezoid.
- 14. Thank you!

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