3. Special Right Triangles
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Let's begin with recalling the 30∘- 60∘- 90∘ Triangle Theorem. This theorem tells us that the length of the hypotenuse of this right triangle is 2 times the length of the shorter leg s, and the length of the longer leg is 3 times the length of the shorter leg.
Now let's take a look at the given picture. We will draw an altitude of an equilateral triangle base. Let h represents this altitude.
Notice that after drawing an altitude we got the 30∘- 60∘- 90∘ triangle. Therefore, the shorter leg of this triangle has a length two times less than 4.