Question

Pliss tolong jwb ya pakek caranya

Answer 1

4)
L1 = 2 x 1/2.a.t = 2 x 1/2. 8. 10 = 80 cm2
L2 = 1/2.a.t = 1/2. 8. 6 = 24 cm2
L total = L1 + L2 = 80 + 24 = 104 cm2

K = 8+12+10+6+12 = 48 cm

5)
L1 = s.s = 20. 20 = 400 cm2
L2 = 1/2 phi. r. r = 1/2 . 3,14. 10. 10 = 157 cm2
L3 = 1/2. a. t = 1/2. 20. 6 = 60 cm2
L total = L1 - ( L2 + L3 ) = 400 - ( 157+60) = 400 - 217 = 183 cm2

Keliling = 1/2. phi. d + 2s + 2sm(sisi miring)
              = 1/2. 3,14. 20 + 2.20 + 2.13
              = 31,4 + 40 + 26 = 97,4 cm

6)
L1 = p.l = 16.5 = 80 cm2
L2 = 1/2 phi. r. r = 1/2. 3,14. 2. 2 = 6,28 cm2
L total = L1 + L2 = 80 + 6,28 = 86, 28 cm2

Keliling = 1/2. phi. d + 2l + p + (p-d)
              = 1/2. 3,14. 4 + 2.5 + 16 + (16-4)
              = 6,28 + 10 + 16 + 12
              = 44, 28 cm