(50 points!) Find the missing angles.

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.