Answer:

Step-by-step explanation:
we know that


therefore

Answer: 9 fewer
Step-by-step explanation:
Add 13 and 11 which gives you 24. Then add 8 and 7 which gives you 15. Then subtract 24 - 15 which gives you a difference of 9.
Add them all up and if they add up to 180 then your side lengths are good
Answer:
828
Step-by-step explanation:
he is the fastest typist