1. Week 12 day 1 2 The graph shows the height of a tennis ball from the time it is served to the time it hits the ground on the other side of the net. How many seconds elapse while the ball is 7 feet or more above the ground? Record your answer and be sure to use the correct place value. 0 2 4 6 8.2.4.6.81.01.21.41.61.8 time (s) height (ft)

2. 8.2 Special Right Triangles

3.  45 0 -45 0 -90 0 Triangle Theorem  In a 45 0 -45 0 -90 0 triangle, both legs are congruent and the length of the hypotenuse is  2 times the length of a leg. hypotenuse =  2  leg 45 0 s s s2s2 Pardekooper

4. Lets try a problem 9 h h=92 h=12.72 Pardekooper

5. Lets try one more 2222 h h=222 h=4 Pardekooper

6. Here’s one for baseball. A high school baseball diamond is a square. The distance from base to base is 90 ft. To the nearest foot, how far does the catcher throw the ball from home plate to second base ? 90 ft. x ft. x=902 x=126.9 x=127 Pardekooper

7. 30 0 -60 0 -90 0 Triangle Theorem In a 30 0 -60 0 -90 0 triangle, the length of the hypotenuse is twice the length of the shorter leg. The length of the longer leg is  3 times the length of the shorter leg.. hypotenuse =2  shorter leg longer leg=  3  shorter leg 60 0 30 0 s 2s s3s3 Pardekooper

8. Lets try a problem h=2(5) h=10 60 0 30 0 5 h l l=53 l=8.65 h=2s l=s3 Pardekooper

9. Here’s another 8=2s 2 2 60 0 30 0 s 8 l l=43 l=6.92 h=2s l=s3 4=s Pardekooper

10. Just one more 45 0 30 0 7272 b a c d h=s2 h=72 s=7 d=7 c=7 h=2s h=2(7) h=14 a = 1 4 l=s3 l=73 l=12.11 b=12.11 Pardekooper

11. Workbook P. 399 Pardekooper

12. Assignment Workbook Page 399 all