Height to arm length ratio: 6:3 ft or 2:1 (since 36 inches is 3 feet)
If you were 30 feet tall, your arm would be 15 feet long.
Not all triangles have right angles. A triangle is simply a closed figure with three sides and three angles, the sum of the degrees of which add up to 180°.
For instance, an equilateral triangle will will have all three angles equal to each other (60°, 60°, 60<span>°).
Some triangles may have right angles (90</span><span>°), but not all do.
Hope that helped =)</span>
