Answer:
for the first 2 neither one is a polygon because a polygon has straight sides and is closed connections were the first shape has an open connection and the second shape has a curved line. for question i believe is 48 and question 4 is 145.
explanation.
for the last 2 problems their total equal 360 so you just add up all the side then subtract the number you got by 360 and that's your answer. ex.) 120 +130+ 62=312. 360-312=48
The formula for direct variation is y = kx<span> where k </span>≠ 0
y = 9/x is an inverse relation
28 is 80% of what number....
28 = 0.80x
28/0.80 = x
35 = x.......so 28 is 80% of 35
It depends what the shape is
Start by simplifying both fractions
As you can see both fractions simplify to a same value hence the equality
stands.
Hope this helps.