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Diket
Bangun 1 = Trapesium
a = 8cm
b = 14cm
s = 5cm
t = √ (5)² - (½. (14-8))² = √25 - (3)² = √25-9 = √16 = 4cm
Bangun 2 = Persegi panjang
p =8cm
l = 6cm
Bangun 3 = Persegi panjang
P = 23cm
L = 17- (6+4) = 17-10 = 7cm
Dit
Luas?
Jawab
Bangun 1 = ((a+b).t)/2 = ((8+14).4)/2 = (22.4)/2 = 88/2 = 44cm²
Bangun 2 = p.l = 8.6 = 48cm²
Bangun 3 = p.l = 23.7 = 161cm²
Jumlah Luas keseluruhan
(44 + 48 + 161)cm²
= 253 cm²
= D
××××××××××××××
42)
Diket
Dus besar balok
p = 14cm
l = 5cm
t = 6cm
Dus kecil kubus
r = 2cm
dus besar diisi 6/7 bagian
Dit
jml kubus kecil?
Jawab
Luas Balok
p.l.t = 14.5.6 = 420cm³
Luas Kubus
r³ = 2³ = 8cm³
6/7 Luas Balok = 6/7 . 420cm³ = 6.60cm³ = 360cm³
Banyak kubus = 360cm³ : 8cm³ = 45 buah
= C
Jadikan Jawaban terbaik ya :)