## Monday, November 15, 2010

### Hazel's Pythagorean Relationship Scribe Post

Key Ideas

The Pythagorean relationship can be used to determine the length of the hypotenuse of a right triangle when the lengths of two legs are known.

The Pythagorean relationship can be used to determine the leg length of a right triangle when the lengths of the hypotenuse and the other leg are known.

1. Jack must determine the missing side of a triangle. He decides to draw it and then measure it,as shown. Do you agree with the method that Jack is using? Explain.

Answer: No, I don't agree with the method that Jack is using because it would take too much work. It would be easier if he just used the formula: a²+b²=c² then √c²=c (hypotenuse).

2. Kira calculated the missing side length of the right triangle.
Is Kira correct? If she is correct, explain how you know. If she is incorrect, explain the correct method.
Answer: Kira is incorrect. She should've used the formula b²=c²-a² or in this case, y²=x²-w².

3.Determine the length of the hypotenuse.

4.What is the length of each hypotenuse? Give your answer to the nearest tenth of a centimetre.

Here is a
link to the textbook website.
Here is a
link to a pythagoras website.