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!Polygons!

!Polygons!. http://www.brainpop.com/math/geometryandmeasurement/polygons/. Let’s Review- What is a polygon?. Polygons are many-sided figures With sides that are line segments Named according to the number of sides and angles they have.

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!Polygons!

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  1. !Polygons! http://www.brainpop.com/math/geometryandmeasurement/polygons/

  2. Let’s Review-What is a polygon? • Polygons are many-sided figures • With sides that are line segments • Named according to the number of sides and angles they have. • Can be “regular” – all sides and all angles are equal to each other

  3. Polygons These figures arenot polygons These figures are polygons

  4. Polygon Names Triangle 3 sides 4 sides Quadrilateral 5 sides Pentagon 6 sides Hexagon 7 sides Heptagon 8 sides Octagon 9 sides Nonagon 10 sides Decagon Dodecagon 12 sides n sides n-gon

  5. Parallel Lines • Two lines are parallel if they are on the same plane and never intersect. • Plane- flat surface. • Intersect – means never touch. Parallel Lines Not Parallel

  6. QUADRILATERALS

  7. QUADRILATERAL • A QUADRILATERAL is a closed figure with four sides and four angles. • They are named based on their sides and angles.

  8. The sum of the angles of all quadrilaterals is 360°. • Angle 1 + angle 2+ angle 3 + angle 4 = 360° 360°

  9. Parallelogram • A QUADRILATERAL with opposite sides parallel and opposite sides congruent

  10. Rectangle • A rectangle is • QUADRILATERAL – 4 sides • PARALLELOGRAM – opposite sides are parallel • All angles are right

  11. SQUARE • A square is a • QUADRILATERAL – 4 sides • PARALLELOGRAM – opposite sides are parallel • All sides are congruent • All angles are right

  12. RHOMBUS • A rhombus is a • QUADRILATERAL – 4 sides • PARALLELOGRAM – opposite sides are parallel • All sides are congruent • Opposite angles congruent

  13. TRAPEZOID • A trapezoid is a • QUADRILATERAL – 4 sides • Exactly one pair of parallel sides Parallel lines

  14. Kite • A kite is a • QUADRILATERAL – 4 sides • With no parallel sides • 2 pairs of adjacent congruent sides 4 in. 2 in. 2 in. 4 in.

  15. Quadrilateral Parallelogram Rhombus Rectangle Square Trapezoid

  16. A quadrilateral simply has 4 sides – no other special requirements. Quadrilateral 2 pairs of parallel lines 1 pair of parallel lines 2 pairs of adjacent congruent lines Parallelogram Trapezoid 4 congruent sides 4 right angles A trapezoid has only one pair of parallel sides. A parallelogram has two pairs of parallel sides. Kite Rhombus Rectangle An kite is a quadrilateral with NO parallel sides but 2 pairs of adjacent congruent sides. 4 congruent sides and 4 right angles A rectangle has four right angles. A rhombus is a parallelogram that has four congruent sides. A square is a specific case of both a rhombus AND a rectangle, having four right angles and 4 congruent sides. Square

  17. Best Name:

  18. Best Name: Trapezoid

  19. Best Name:

  20. Best Name: Square This quadrilateral is also: • a rectangle • a rhombus • a parallelogram

  21. Best Name:

  22. Best Name: Rhombus This quadrilateral is also: • a parallelogram

  23. Best Name:

  24. Best Name: Quadrilateral

  25. Best Name:

  26. Best Name: Rectangle This quadrilateral is also: • a parallelogram

  27. Best Name:

  28. Best Name: Parallelogram

  29. Best Name:

  30. Best Name: Trapezoid

  31. Best Name:

  32. Best Name: Quadrilateral

  33. Best Name:

  34. Best Name: Parallelogram

  35. Best Name:

  36. Best Name: Trapezoid

  37. Best Name:

  38. Best Name: Rectangle This quadrilateral is also: • a parallelogram

  39. Best Name:

  40. Best Name: Rhombus This quadrilateral is also: • a parallelogram

  41. Best Name:

  42. Best Name: Square This quadrilateral is also: • a rectangle • a rhombus • a parallelogram

  43. You rock!

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