2. Geometric Figures 8 th grade Mathematics Ms. Warnetsky Click here to go to next slide!

3. Geometric Figures CirclesTriangles Squares Octagon Hexagon Pentagon Question #1 Question #2 Click here to return to the first slide Click on the figure to learn about each!

4. Circles Area Formula A=πr 2 Circumference C=2πr 360° Radius is half the length of a circle Diameter is the full length of a circle Click to return to home screen

5. Triangles Area Formula A=.5bh Perimeter Formula P=a+b+c 180° Pythagorean Theorem Use only on right triangles to find the length of one of the legs, or hypotenuse. a 2 +b 2 =c 2 Click to return to home screen

6. Squares All four sides are equal in length. All angles are 90° Area Formula A=a 2 Perimeter Formula P=4a Click here to return to the home screen

7. Octagons 8 sided polygon Interior angles= 135° Exterior angles= 45° Area Formula 2(1+√2)s 2 Click here to return to the home screen

8. Hexagons 6 sided polygon Interior angles= 120° Exterior angles= 60° Area Formula (1.5√3) × s 2 Click here to return to the home screen

9. Pentagons 5 sided polygon Interior angles= 108 Exterior angles= 78 Area Formula *Apprx* 1.7204774 × s 2 Click here to return to the home screen

10. Using the Pythagorean Theorem, what is the length of the hypotenuse? 8 in 6 in C=? A.100100 B.1010 C.360360 Click here to return to the home page Click here to go to then end of the lesson

11. Oops! That’s not right, try again! The Pythagorean Theorem is a 2 +b 2 =c 2. So make sure you plug in the numbers correctly and work it out! Also make sure to check your answers! A. 100 Click here to go back to the question

12. B. 10 Click here to go back to the question

13. C. 360 The Pythagorean Theorem is a 2 +b 2 =c 2. So make sure you plug in the numbers correctly and work it out! Also make sure to check your answers! Oops! That’s not right, try again! Click here to go back to the question

14. What is the circumference of this circle? A.16π or apprx. 50.2416π or apprx. 50.24 B.26π or apprx. 81.6426π or apprx. 81.64 C.14π or apprx. 43.9614π or apprx. 43.96 Click here to return to the home page Click here to go to the end of the lesson

15. A. 16π or apprx. 50.24 Click here to go back to the question

16. B. 26π or apprx. 81.64 Uh oh! That’s not correct! Try again! The formula for the circumference of a circles is C=2πr. Make sure you are plugging in the correct numbers and solving it correctly! Click here to go back to the question

17. C. 14 or apprx. 43.96 Oops! That’s not quite right, try again! The formula for the circumference of a circles is C=2πr. Make sure you are plugging in the correct numbers and solving it correctly! Click here to go back to the question

18. Hope this activity helped you in learning qualities of Geometric Figures!