Page 131 - MATEMATIKA KELAS 6 SD
P. 131
R u m us
Rumus
r
Bangun Datar
B
ta
un
g
a
D
n
a
Persegi Persegi Panjang
A B A B
Luas = p × l
Luas = s × s l
s Keliling = 4 × s p Keliling = 2 × (p + l)
s s = sisi D C p = panjang
D C l = lebar
Segitiga Trapesium
1
1
A Luas = × a × t A B Luas = × (a × b) × t
2 2
Keliling = s + s + s b Keliling = s + s + s + s
s s s t s
t s = sisi a a = alas bawah
a t = tinggi D C b = alas atas
B s C a = alas s = sisi
Jajar Genjang Lingkaran
Luas = a × t Luas = π × r × r
t b r
a Keliling = 2 × (a + b) Keliling = π × d
d
a = alas bawah r = jari-jari
b = sisi miring d = diameter
t = tinggi
Belah Ketupat Layang-layang
Keliling: Luas:
2
s s 4 × s s1 s1 1 × d1 × d2
d1 Luas:
1 × d1 × d2 d2 Keliling:
d2 2 s2 s2 (2 × s1) + (2 × s2)
s s
s = sisi s = sisi
d = diagonal d1 d = diagonal
□ × □ = 121
