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Polygons

Polygons. Quadrilaterals. A quadrilateral is a geometric figure that is made up of four line segments, called sides, that intersect only at their endpoints. What are parallel lines?. Two lines that never intersect. Special Quadrilaterals. Trapezoid

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Polygons

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  1. Polygons

  2. Quadrilaterals • A quadrilateral is a geometric figure that is made up of four line segments, called sides, that intersect only at their endpoints.

  3. What are parallel lines? Two lines that never intersect.

  4. Special Quadrilaterals • Trapezoid • A quadrilateral with exactly 1 pair of parallel sides. • Parallelogram • A quadrilateral with 2 pairs of parallel sides.

  5. Special Quadrilaterals • Rectangle • A parallelogram with 4 right angles. • Rhombus • A parallelogram with 4 congruent sides.

  6. Special Quadrilaterals • Square • A parallelogram with 4 right angles and 4 congruent sides.

  7. Polygons • A polygon is a geometric figure that is made up of three or more line segments that intersect only at their endpoints. • The numberof sides determines the name of the polygon.

  8. POLYGONS • Triangle • 3 sides • Quadrilateral • 4 sides • Pentagon • 5 sides

  9. POLYGONS • Hexagon • 6 sides • Heptagon • 7 sides • Octagon • 8 sides

  10. Regular Polygons • A regular polygon is a polygon with all sides equal in length and all angles equal in measure.

  11. A Regular Polygon Question • The polygon shown is a regular pentagon. Find the perimeter of the pentagon. Since it’s a regular pentagon, all the sides are the same length. 5 (3 ft) = 15 ft 3 ft

  12. Another Regular Polygon • A regular hexagon has a total perimeter of 150 inches. Find the measure of each side of the polygon. A hexagon has 6 sides. Since it’s a regular hexagon all of the sides are equal in length. 150 ÷ 6 = 25 inches Each side measures 25 inches.

  13. Polygons in Real Life? Guess which polygon is in each picture. Square 1 Trapezoid 2

  14. Polygons in Real Life? Triangle 3 4 Heptagon

  15. Polygons in Real Life? 5 Octagon 6 Quadrilateral

  16. Polygons in Real Life? Pentagon 7 8 Parallelogram

  17. What did we learn today? • There are many different polygons such as a triangle, quadrilateral, pentagon, hexagon, heptagon, and octagon. • There are 5 special quadrilaterals: trapezoid, parallelogram, rectangle, rhombus, and square. • A regular polygon is a polygon with all sides equal in length and all angles equal in measure.

  18. Practice: Who Am I? Worksheet.

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