What is the median for 280 +280 divided by 2

180

step-by-step explanation:

12-2=10

20-2=18

18x10=180

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58

false

step-by-step explanation:

the reason i say this is because for a certain length of sides you can pick any two and the length is wither equal or greater than the third side and in this case it's not.

3 + 5 = 8

8 is smaller than 9 which is the third side.

hope this : )

answer: no

step-by-step explanation: because the big angle will spread away the 2 side that it is on and make the opposite side even longer.