Question

Tolong ya bantuannya

Answer 1

Panjang = 21 + 25
             = 46
lebar    = 21 + 10
           = 31
jawaban
luas arsir = luas persegi - luas 1/2lingkara
               = ( 31 x 46) - ( 1/2 x 22/7 x 21 x 21)
               = 1426 - ( 11 x 3 x 21)
               = 1426 - 693
               = 733 cm²
kliling = 2 ( 25 + 10 ) + kliling 1/2 lingkaran
         = 2 ( 35 ) + ( 1/2 x 2 x 22/7 x 21)
         = 70 + ( 22 x 3)
         = 70 + 66
         = 136 cm

Answer 2

LUAS
L 1/2 lingkaran = 1/2 r² = 1/2 × 22/7 × 21 × 21 = 11 × 3 × 21 = 693
L persgi pjg = p × l = (21 +25) × (21 + 10) = 46 × 31 = 1426 - 693 = 733 cm²
KELILING
K 1/2 lingkaran = 1/2 × 2 r = 1/2 × 2 × 22/7 × 21 = 22 × 3 = 66
K prsgi pjg = 2 × (p+l) = 2 × (46 + 31) = 2 × 77 = 154 - 66 = 88 cm

maaf kalo salah