Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
i get A as well. You know from stem that you are dealing with an isoceles triangle, and so two sides are equal in terms of angles.
From stat 1, you know that one angle is 100 .. since the sum of angles in a triangle is only 180, this angle can't be the isoceles one since 100+100 = 200 >180 . So we must have 100 + 2x=180, and x=40.
From stat 2, you know one side is 40, but this side may or may not be part of the isoceles pair ... insuff.