Question

Bantu aku kerjain ya kakak kerjakan PR Matematika 1 - 5

Tolong pake caranya ya kakak

Answer 1

1. r = d : 2
= 24 : 2
= 12
L = phi . r . r
= 3,14 x 12 x 12
= 452,16

2. L = phi . r . r
= 3,14 x 6 x 6
= 113,04

3. r = phi : L
= 3,14 : 314
= 0,01
= √0,01
= 0,01

4.r = d : 2
= 21 : 2
= 10,5
L= 1/2 . phi . r . r
= 1/2 . ( 22/7 . 10,5 . 10,5 )
= 1/2 x ( 22 x 1,5 x 10,5 )
= 1/2x ( 33 x 1,5 )
= 1/2 x 49,5
= 24,75



5. L = 1/4 . (phi . r . r)
= 1/4 x ( 22 / 7 x 7 x7 )
= 1/4 x ( 22 x 1 x 7 )
= 1/4 x 154
= 38,5