Penjelasan dengan langkah-langkah:

6)

a. sudut MSP = 90° – 45° = 45°

sudut RNQ = 90°

b. MN = SR = 26 cm

c. PM = QN = (48 – 26)/2 = 11 cm

t = SM = PM = 11 cm ( karena SMP ∆ siku² sama kaki

d. Luas = (26 + 48)/2 x 11 = 407 cm²

7) Tabel distribusi frekuensi

Nilai Frekuensi

6 3

7 8

8 7

9 5

10 2 +

Jumlah 25

8) x + 2 + 3x + 6 = 180°

4x + 8 = 180°

•••dibagi 4•••

x + 2 = 45

x = 45 – 2

x = 43°

9)

a. besar sudut = 180° – 60° = 120°

b. s1 : s2 = 1 : 4

s2 = 4s1

Luas = (s1 + s2) x t/2

60 = (s1 + 4s1) x 8/2

60 = 5s1 x 4

s1 = 60/20

s1 = 3 cm

s2 = 4s1

s2 = 4 x 3

s2 = 12 cm

c. Keliling = s1 + s2 + 2 x kaki trapesium

Keliling = 3 + 12 + 2 x 10

Keliling = 35 cm

10) Persegi Panjang

Keliling = 2 x (p + l)

Keliling = 2 x (p + l)Luas = p x l

a. K = 60 cm

L = 216 cm²

b. K = 82 cm

L = 400 cm²

c. K = 90 cm

L = 450 cm²