(1) The master bent two steel bars with the length of 15cm according to the ratio of 3: 2, and then put them into a parallelogram connected end to end. Can the area of parallelogram be 36 square centimeters? If yes, find the area of the largest circle of this parallelogram; If not, explain why.

Yes, because 15cm should be 9 and 6 if divided by 3: 2 minutes, so the maximum area of the quadrilateral is 9×6=54 cm2.

So if it is set to 36 square centimeters, it can be achieved.

If the base is 9, the height is 4, and if the base is 6, the height is 6.

(2) New Year's Day is coming, and shopping malls use various tricks to sell goods. Clothing supermarket advertisement: over 300100; Star supermarket advertisement: 30% off the whole audience; Department store: 50% off the whole audience. After reading these advertisements, if Xiao Fang's mother wants to buy 200 yuan's sweater, what should you choose?

Clothing Supermarket 200 yuan

Star Supermarket 200×70%= 140 yuan

Department store 200×50%= 100 yuan

You should go to the department store because it's cheaper there.