1. Polygons
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2. Warm Up Is the angle acute, obtuse or right? right 1. 2. acute 4.3.
acute

3. Polygons

4. A polygon is a closed figure formed by line segments that do not cross.

5. Polygon Sort
Sort the polygons into groups by characteristics.

6. Polygon
Number of Sides
Triangle 3
Quadrilateral 4
Pentagon 5
Hexagon 6
Octagon 8
Decagon 10

7. Types of Quadrilaterals

8. Rectangle with 4 congruent sides.
Quadrilateral
Characteristics
Parallelogram
Opposite sides are congruent and parallel.
Rectangle
Parallelogram with 4 right angles.
Rhombus
Parallelogram with 4 congruent sides.
Square
Rectangle with 4 congruent sides.
Kite
Quadrilateral with 2 pairs of adjacent sides that are congruent.
Trapezoid
Quadrilateral with only one pair of parallel sides.

9. Types of Triangles

10. Triangle
Characteristics
Acute
Three acute angles
Obtuse
One obtuse angle
Right
One right angle
Equilateral
Three congruent sides
Isosceles
At least two congruent sides
Scalene
No congruent sides

11. Closure
Compare the two polygons.