And now this is just a plain old (“plane” old?) Plane Geometry problem. You know two sides of a right
triangle and need the third. Sounds like a job for the Pythagorean theorem.
The answer is (E). And no distance formula required.
Trigonometry
There’s a common misconception about the ACT regarding Trigonometry. Many believe that if you don’t
have a solid foundation in Trigonometry, you can’t get a good score on the ACT Math test. However, let’s
think back to the chart from the beginning of this lesson. Remember, there are only 4 trig questions on any
