Yes -5/0 is undefined because having 0 of something means you cannot split that 0 into any number so the answer is undefined.
Answer:
61 degrees
Step-by-step explanation:
add A and C and subtract 180 by the sum
Ok well the only thing that makes since to me is that the triangle is a Equilateral Triangle, so all the sides are going to be the same. And if the perimeter is 24, then you divide that by 3, and you get 8. And if DEF is the midpoints of triangle ABC, then DEF is an upside down triangle in the triangle ABC. So all the sides of ABC are double whatever DEFs are. And DEFs were 8, so 8 times 2 is 16. And to get the perimeter you add that together 3 times and you get 48. So i'm not sure exactly how you would do this, but i'm pretty sure this is the way. If not i'm sorry i couldn't help. :(
Answer:
77%
Step-by-step explanation:
(75+76+77+80) / 4 = 77
