Parts of a Right Triangle
A right triangle is a triangle that has one right angle. We know that a triangle has three sides. Notice, in the picture below, that there is a side across from the right angle. (We have colored them green.) This side is called the hypotenuse of the right triangle. The other two sides are called the legs.
Now you are ready to look at a relationship between the 2 legs and the hypotenuse.
Sketchpad Activity I
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