tolong dibantu ya pliss besok kumpul

no. 28
luas persegi
[tex]l = 48 \times 48 = 2304[/tex]
luas trapesium:
[tex]l = \frac{(a + b)t}{2} = \frac{(80 + 48)32}{2} = \frac{(128)32}{2} = \frac{4096}{2} = 2048[/tex]
luas total = 2304 + 2048 = 4352cm"

jawabannya d

no 29
k = 2(p + l)
k = 2 (375 + 175)
k = 2 (550)
k = 1100

jarak antar tiang 2.5 m, maka
[tex] \frac{1100}{2.5} = 440[/tex]
jawabannya a

no. 30
Lp= 2 {(p×l) + (p×t) + (l×t)}
Lp = 2 {(27,5 × 15) + (27,5 × 20) + (15 × 20)
Lp = 2 {(412,5) + 550 + 300}
Lp = 2 {1262,5}
Lp = 2525

jawabannya c