1. Math Review 7 - 3 What is the square root of 144? Solve for r: 12r - 2 = 62 Solve for x: 5x + 14 = 34 -10 Challenge: 25x - 8 = 5x + 108 4536 1.) 2.) 4.) 5.) 3.)

2. Classifying Polygons: Angles I can classify a polygon using knowledge of angles. Created by: Rachel Tankersley Sycamore Elementary 5th grade

3. Essential Questions What is an angle? What is an acute angle? What is an obtuse angle? What is a right angle? How do I know what the polygon is by the angles?

4. Angle Review: What type of angle is less than 90 degrees? That’s right! Acute... because it is just so... cute:)

5. Angle Review: What type of angle is more than 90 degrees? That’s right! Obtuse!!!!

6. Angle Review: What type of angle is exactly 90 degrees? That’s right! RIGHT... like the corner of your paper:)

7. How do these apply to polygons? Think of each corner of a polygon as an angle. Then you will see that there are all different polygons with the angles:)

8. Let’s take a look:) Take a look at the corners... what do you notice? Are they acute? Are they right? Are they obtuse? So this polygon has _____ right angle? I’m a square! 4

9. Please get out your slates and be ready to practice in 10...9...8... We will do one more together:) Then you will practice with a partner.

10. Together let’s figure out these angles... Take a look at the corners... what do you notice? Are they acute? Are they right? Are they obtuse? So this polygon has _____ right angles _____ acute angles _____ obtuse angles 0 2 2

11. Partner time... Take a look at the corners... what do you notice? Are they acute? Are they right? Are they obtuse? So this polygon has _____ right angles _____ acute angles _____ obtuse angles 2 2 0

12. Partner time... Take a look at the corners... what do you notice? Are they acute? Are they right? Are they obtuse? So this polygon has _____ right angles _____ acute angles _____ obtuse angles 2 2 0

13. Partner time... Take a look at the corners... what do you notice? Are they acute? Are they right? Are they obtuse? So this polygon has _____ right angles _____ acute angles _____ obtuse angles 2 2 0

14. Closure On your slate please write the definition of an acute, right and obtuse angle. Be ready to share in 2 minutes.

15. Follow Up You are going to complete two worksheets from the document camera. You will need to work carefully and quickly, so I can turn the page over in about 10 min.