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# Geometry tips

**Geometry: Pythagorean triples (memorize for success)**
This is for 7th graders, 8th graders and geometry students, and SAT test takers
Pythagorean triples are integer side lengths of a right triangle. The biggest number is the hypotenuse, and the two smaller numbers are the legs
3,4,5
5,12,13
8,15 17
7, 24, 25
and there multiples like
6,8,10
10,24,26
**Example 1**:
If the two legs of a right angle triangle are 3cm and 4cm, what is the value of the hypotenuse?
Answer is 5cm
**Example 2**
if the diagonal of a rectangle is 25in, and the length of the rectangle is 24in, what is the width of the rectangle?
Hint: a diagonal cuts a rectangle into two equal right triangles whose hypotenuse is the diagonal. sketch the rectangle
Answer is 7in