Answer:
Similar
Explanation:
To find if shapes are similar or not similar, take side ratios of corresponding sides. Let's take the top and left sides of each shape (bigger: 28, 24; smaller: 21, 18)
If the side ratios are the same, then they are similar.
Side ratio of top side: 28:21 = 4:3
Side ratio of left side: 24:18 = 4:3
Since the side ratios are the same, they are similar.
Alternatively, you could do this with the ratios of the top side to the left sides on each shape.
Side ratio for bigger shape (top:left) : 28:24 = 7:6
Side ratio for smaller shape (top:left) : 21:18 = 7:6