## Tuesday, November 16, 2010

### Patrick's Textbook Post Pages 103-105. Numbers 5,8,11,14

area of square = a²
area of square = 6x6
area of square = 36cm²

area of square = b²
area of square = 8x8
area of square = 64cm²

a² + b² = c²
6² + 8² = c²
36 + 64 = c²
100cm² = c²

√100cm² = √c²
10cm = c

a² + b² = c²
50² + 200² = c²
2500 + 40 000 = c²
42500 cm² = c²
√42500 cm² = √c²
206 cm = c

√914 = √c²
30.2 cm = c
c² - a² = b²
30.2² - 17² = b²
912 - 289 = b²
623 cm² = b²
√623 cm² = √b²
25 cm = b

perimeter = a + b + c
perimeter = 17 + 25 + 30.2
perimeter = 72.2

b²=c²-a²
b²=5²-3²
b²=25-9
b²=16m²
√b²=√16m²
b=4m

c²=a²+b²
c²=6²+4²
c²=36+16
c²=52m²
√c²=√52m²
c=7.2m
The length of c is 7.2m.

1. Great post patrick, I liked that you have the answers for them and i understand that some of them are hard. I liked that your post is very neat and descriptive but you should add a video and a link.

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3. Nice post Patrick. I liked the pictures and it is very neat and organized. Also I liked that you showed all your work. Next time add a video and link. Other than that, great job.

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5. Good job, Patrick! I have the answer to 14. So, you can see that there are two triangles. They gave you a smaller triangle and a larger one, which is the whole triangle. The information provided is, how long the hypotenuse is for the smaller triangle and how long "a" (or one of the legs) are for both triangles. So, the easiest thing to do is find is "b" because the gave you the length of the hypotenuse, which was 5cm, and they gave you length of "a", which was 3cm. So, you do c2-a2=b2 and the answer is 4cm. So, now you know the length of "b". To find "a" for the bigger triangle you add 3+3, which equals 6cm. So "a" is 6cm. And now all you need to find is "c" the hypotenuse. So you do, a2+b2=c2. and the answer is 7.21cm

6. For number 14 I got :
14) c²-a²=b²
5²-3²=b²
25-9=b²
16m²=b²
√16m²=√b²
4m=b
The length of b is 4m.

a²+b²=c²
6²+4²=c²
36+16=c²
52m²=c²
√52m²=√c²
7.2m=c
The length of c is 7.2m.

7. i just found out how to do it, thank you julibella and glenesse :D

8. Good job, Patrick! Next time you may want to consider adding a video.

The hypotenuse for b is 5m. So 3m squared is 9m, 5m squared is 25m and if you subtract them it equals 16m. Then you square root 16m and it equals 4m. b=4m

The hypotenuse of c is 7.2m because 4m squared is 16m and 6m squared is 36m. So add them together, 16+36=52. 52 square root is 7.2, rounded to nearest tenth.
c=7.2m

Hope this helps!

9. Good job Patrick. I like the pictures and it is all very organized.

10. Great job, Patrick. I liked how you showed your work using pictures. It was also neat and organized but next time add a video and a link.

11. Good Job Patty! I really like how you showed your work and the pictures you added are really pro! BUT next time add a video and a link :)

12. Goof Job, i like, but having a video would have been an excellent idea.