Determine whether the polygons are similar. show how.

Yes, Yes, Yes

Step-by-step explanation:

21/14 = 1.5

15/10 = 1.5

Yes, you're increasing both the width and length of the smaller polygon by the same ratio (1.5) to get the larger polygon

21/7 = 3

15/5 = 3

Yes, you're (once again) increasing both the width and length by the same ratio (3)

The larger polygon has been rotated (or so I think)

35/28 = 1.25

25/20 = 1.25

The corresponding sides have been increased by the same ratio (1.25) so they're mathematically similar!

c.35

step-by-step explanation:

8+13=21

21+8=29

29+6=35

only 10/60 isn't equivalent

hope this : )