## Friday, November 5, 2010

### Kevin's Pythagoras Scribe post

For this blog I will be showing questions 5, 10, 15, and 19.

5. A right triangle has side lengths of 40 mm, 75 mm, and 85 mm.
a) Sketch the triangle. Draw a square on each side of the triangle.

b) What are the areas of the three squares?

c) Write an addition statement with the areas of the three squares.

WORK
b) Area of 40 (a) is 1600 mm² Area of 75 (b) is 5625 mm² Area of 85 (c) is 7225 mm² c) a² + b² = c² 40² + 75² = c² 1600 + 5625 = c² 7225 mm² = c² 7225 square root is 85mm = c

10. A triangle has side lengths of 120 mm, 160 mm, and 200 mm. Is the triangle a right triangle? Explain your reasoning.

WORK
Yes this triangle is indeed a right triangle. Due to the fact that a²+b²= c² you add the sums of the smallest squares (120mm and 160mm) which should equal the area of the largest square.
e.x. 120² + 160² = 200² 14,400 + 25,600 = 40,000

15. Construction workers have begun to dig a hole for a swimming pool. They want to check that the angle they have dug is 90°. They measure the diagonal as shown to be 9.5 m. Is the angle 90°? Explain your reasoning.

WORK
No the angle is not 90°. For the it to be 90° the diagonal line would have to be 10m. e.x. 6² + 8² = c² 36 + 64 = c² 100² = c² square root 100 = 10 / square root c² = c

19.A right triangle has a square attached to each side. Two of the squares have areas of 10 cm² and 15 cm². What are possible areas for the third square? Draw a sketch for each solution.

WORK
Possible areas for the third square include 5cm² and 25cm² (I got 5 from subtracting 10 from 15 and I got 25 from adding 10 and 15.)

Thank you for reading my post/ please leave a link because unfortunately I couldn't find one. Thanks again!

1. Sorry about the bad quality in my pictures, to inform you I don't know how to make a square root sign so I put "square root". I hope you guys leave good comments.

2. Good job, Kevin. I liked how you added questions on your post. Your pictures was clearly understandable to read and the colors you've added in caught my attention. Next time, you might want to add a video. Other than that, good job.

3. Great job on your post Kevin, I liked that you put colours on your post to catch people's attention but there is such thing as too much colours. I also liked that you explained your work very well. Here's a link that I found for you based on
Pythagoras and I also know that making a square root is that you have to press alt+251.

4. Great post Kevin. I really liked the pictures you used, and the fact you showed all your work. It would have been better if you spaced out your information a bit more, but other than that the post was fairly well done. Here's a link to a site I thought was pretty useful.

5. Your post was very self explainitory, but next time try adding a video like this one.

6. Great post Kevin! Your post helped me correct some of my homework and your post would be good for studying for any upcoming tests or quizes. I liked how you showed your work and expained everything, that was very helpful. Overall, great job!

7. Nice post Kevin. I liked the color you used. It really helped me when i got a question wrong. I also liked your pictures. Next time add a link and a video. Here is a link that I found useful.

8. Great post, Kevin! The pictures were clear to me, and plus, your answers helped me get the right answer, or add more to it. The colors you used are quite nice. Next time, add a video and a link. Other than that, great job!

9. Nice post Kevin. Your post is really colorful. It's great even though it doesn't have a link.

10. Great job Kevin. I like that you explained your work very well. The colours you chose were nice too. I found this link very helpful. Next time, you should try adding a video too.

11. Good job, Kevin! I liked that your post was very colours, but try to put a video or a link next time.