circumference
R-3
C= 3.14 * D
18.84
5x6
30
rectangle- 12, 7
38
4*4*3.14
50.24
R-4
C= 3.14 * D
12.56
3x3
9
rectangle- 2,4
12
3*3*3.14
28.26
R-15
C= 3.14 * D
47.1
15x2
30
60
5x5x3.14
78.5
R-50
C= 3.14 * D
314
18x2
36
triangle- S,5 H,3
7.5
6x6x3.14
113.04
R- 30
C= 3.14 * D
94.2
65x3
195
square- 7
28
8x8x3.14
200.96