18.luas bangun diatas adalah
19. 4.721 - 320 : (-16) + 22 × (-9)
20. 28 × (-65 +32)
19. 4.721 - 320 : (-16) + 22 × (-9)
20. 28 × (-65 +32)
18. Luas lingkaran = π x r²
setengah lingkaran = ½ x π x r²
dik = D = 28 , r = 14, π = 22/7
dit= Luas ½ lingkaran
jawab
L = ½ x 22/7 x 14 x 14
= ½ x 44 x 14 = 22 x 14 = 308 cm
L= 308cm
19.Utamakan perkalian dan pembagian terlebih dahulu
= 4721 - 320 : (-16) + 22 x -9
= 4721 + 20 - 198
= 4543
20. 28 x ( -65 + 32 ) = 28 x -33 = -924
SEMOGA MEMBANTU
Diket:
D = 28 cm
r = 14
L = ½ × π × r²
= ½ × 22/7 × 14 × 14
= ½ × 22/7 × 196
= 308 Cm²
4.721 - 320 ÷ (-16) + 22 × (-9) =
= 4.721 - (320 ÷ (-16)) + (22 × (-9))
= 4.721 - -20 + -198
= 4741 + -198
= 4543
28 × (-65 + 32) =
= 28 × -33
= -924
[answer.2.content]
