In triangle abc what is measure of angle c

first pic: 1/2 = 6.25

second pic: Compare the constants of the two variables.

Compare the constants of the two variables.changed at the same rate, or by the same factor, then they are directly proportional. For example, since the x-coordinates changed by a factor of 2 while the y-coordinates also changed by a factor of 2, the two variables are directly proportional.