Jawab:

1. K = 72 cm  L = 54 cm²

2. 15 cm

3. Rp 136.000

4. Rp 174.000

Penjelasan dengan langkah-langkah:

1.

K = 12 cm + 30 cm + 30 cm atau ( 2 x 30 cm )

K = 12 cm + 60 cm

K = 72 cm

L = 1/2 x A x T

L = 1/2 x 12 cm x 9 cm

L = 1/2 x 108 cm²

L = 54 cm²

2.

L = 1/2 x A x T

165 cm²  = 1/2 x 22 cm x T

165 cm²  = 1/2 x 22 cm T

165 cm² = 11 T

T = 165 cm² : 11 cm

T = 15 cm

3.

K = A + B + C

K = 4 cm + 5 cm + 7 cm

K = 9 cm + 7 cm

K = 16 cm

Biaya = 16 cm x Rp 85.000

Biaya = Rp 136.000

4.

K = A + B + C

K = 5 cm + 12 cm + 12 cm atau ( 12 cm x 2 )

K = 5 cm + 24 cm

K = 29 cm

Biaya = 29 cm x Rp 60.000

Biaya = Rp 174.000

Maaf kalau salah

Nt = Aku sekarang agak slow respon ya karena mau buka puasa dulu =>