Find the height of the triangle by applying formulas for the area of a triangle and your knowledge about triangles. This is a triangle. side a has a length of 12 yards. side b has a length of 20 yards. side c has a length of 28 yards. The altitude to side c has a length of X yards. A. 5.3 yds B. 3.7 yds C. 7.4 yds D. 10.5 yds