Jawaban:
33.16cm²
34. 346,185cm²
35. 106cm
36. 78,5 cm²
Penjelasan dengan langkah-langkah:
Nomor 33
L = 1/2 × ( a + c ) × t
L = 1/2 × ( 5 +3 ) × 4
L = 1/2 × 8 × 4
L = 16cm²
Nomor 34
r = d : 2
r = 21 : 2
r = 10,5cm
L = π × r × r
L = 3,14 × 10,5 × 10,5
L = 346,185cm²
Nomor 35
p = L : l
p = 570 :15
p = 38cm
k = 2 × ( p + l )
k = 2 × ( 38 + 15 )
k = 2 × 53
k = 106cm
Nomor 36
L = 1/4 × π × r²
L = 1/4 × 3,14 × 10 × 10
L = 157/2
L = 78,5 cm²
33. Luas Bangun Trapesium
= ½ × Jumlah Sisi Sejajar × Tinggi
= ½ × (5+3) × 4
= ½ × 8 × 4
= 1 × 4 × 4
= 4 × 4
= 16 Cm ✅
————————————
34. π × r²
= 3,14 × 10,5 × 10,5
= 3,14 × 110,25
= 346,185 Cm². ✅
————————————
35. Mencari Panjang Persegi Panjang
= P×L
570 = P × 15
P= 570/150
P= 38
Keliling Persegi Panjang
= 2 × (P+L)
= 2 × (38+15)
= 2 × 53
= 106 Cm²
——————————————
36. Luas ¼ Lingkaran
= ¼ × π × r × r
= ¼ × 3,14 × 10 × 10
= ¼ × 3,14 × 100
= ¼ × 314
= 78,5 Cm²
