Quick needed, need someone to check my answer.

mario’s company makes unusually shaped imitation gemstones. one gemstone had 12 faces and 20 edges. how many vertices did the gemstone have?
a. 34 vertices
b. 10 vertices (my answer)
c. 30 vertices
d. 8 vertices

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7