1. The
Pythagorean
Theorem c a b

2. This is a right triangle:

3. We call it a right triangle because it contains a right angle.

4. The measure of a right angle is 90o

5. The little square in a triangle tells you it is a right angle.

6. About 2,500 years ago, a Greek mathematician named Pythagorus discovered a special relationship between the sides of right triangles.

7. Pythagorus realized that if you have a right triangle,3 4 5

8. and you square the lengths of the two sides that make up the right angle,3 4 5

9. and add them together, 3 4 5

10. you get the same number you would get by squaring the other side.3 4 5

11. Is that correct? ? ?

12. It is. And it is true for any right triangle.8 6 10

13. Question #1 Are the Numbers 11,12 and 5 form a Pythagorean Triplet?
Solution
By Pythagorean theorem,
The numbers 11,12 and 5 does not form a Pythagorean Triplet.

14. Try These..
Check whether the following can be the sides of a right angled triangle
AB = 12 cm, BC = 14 cm, AC = 15cm.
Are the numbers 5, 6 and 7 form a Pythagorean Triplet?