You score 15 16 17 14 and 19 points out of 20 possible points that i test what must you score on the 6th test to have average of 16 points

Hello! To find the answer to this, we must add all of the first 5 numbers. When you do that, the sum should be 81. You must do 16 * 6 to find the number of points combined he needs to add up to the average. 16 * 6 = 96. 96 - 81 = 15. On the 6th test, you must score 15 points to have an average of 16 points. The answer is 15.

One unique triangle, because those angles add up to 180, and that's how many degrees there are in one triangle.