Ineed to know where to plot the points on the graph 30 points

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)