So all the angles in total are going to be 180 degrees. 7+9+10 = 18 (parts at all) 180/18=10 (1 part of the ratio) Than to find all of the angles we multiply 1 part by 7, 9 and 10 separately 10*7= 70 degrees (1st angle) 10*9=90 degrees (2nd angle) 10*10=100 degrees (3rd angle) Answer: 70, 90, 100
