2. Notes Over 9 - 3 Classifying Polygons A polygon with three sides is a _____________. Classifying triangles by angles. Acute Triangle 3 acute angles Right Triangle 1 right angle Obtuse Triangle 1 obtuse angle

3. Notes Over 9 - 3 Classifying Polygons A polygon with three sides is a _____________. Classifying triangles by sides. Scalene Triangle no congruent sides Equilateral Triangle 3 congruent sides Isosceles Triangle 2 congruent sides

4. Notes Over 9 - 3 Classifying Polygons Judging by appearance, classify each triangle by its sides and angles. 1. Scalene Right 2. Equilateral Acute 3. Isosceles Obtuse

5. Notes Over 9 - 3 Classifying Polygons A polygon with four sides is a ________________. Classifying quadrilaterals by angles and sides.

6. Notes Over 9 - 3 Classifying Polygons Judging by appearance, classify each quadrilateral by its sides and angles. RectangleParallelogramTrapezoid 4. 5.6.

7. Notes Over 9 - 3 Classifying Polygons A polygon with all sides and all angles congruent is a _____________ polygon. 7. Write a formula to find the perimeter of a regular pentagon. 8. Use this formula to find the perimeter if one side is 16 cm.

8. Pg 457 9 – 3 #1 – 8, 9 – 26 Sketch each figure. 1. an isosceles right triangle.

9. Pg 457 9 – 3 #1 – 8, 9 – 26 Sketch each figure. 2. a scalene obtuse triangle.

10. Pg 457 9 – 3 #1 – 8, 9 – 26 Sketch each figure. 3. an isosceles obtuse triangle.

11. Pg 457 9 – 3 #1 – 8, 9 – 26 Find the perimeter of each figure. 4. 9.8 cm 3.5 cm

12. Pg 457 9 – 3 #1 – 8, 9 – 26 Find the perimeter of each figure. 5. An equilateral triangle that has a side of 36 yd

13. Pg 457 9 – 3 #1 – 8, 9 – 26 Find the perimeter of each figure. 6. a square that has a side of 5.1 cm

14. Pg 457 9 – 3 #1 – 8, 9 – 267. Draw a parallelogram without a right angle but with four congruent sides. What is another name for this figure?

15. Pg 457 9 – 3 #1 – 8, 9 – 26 8. Draw a regular quadrilateral.

16. Notes Over 9 - 3 Classifying Polynomials