1)R = 10
d= 2R = 20
C = 2πR = 2π * 10 = 20π
S = πR² = π * 10² = 100π
2) C = 2π
C = 2πR
2π = 2πR
R = 1
d = 2R = 2
S = πR² = π* 1² = π
1)R = 10
d= 2R = 20
C = 2πR = 2π * 10 = 20π
S = πR² = π * 10² = 100π
2) C = 2π
C = 2πR
2π = 2πR
R = 1
d = 2R = 2
S = πR² = π* 1² = π