Jawaban:

1. C

2. B

3. D

4. A

5. A

6. 21.600 cm²

7. 768 m²

8. 445

9.

10. 240 cm²

Penjelasan dengan langkah-langkah:

1. K = 2(p+l)

= 2(18+13)

= 2(31)

= 62 cm (C)

2. K = 4×s

= 4×34 cm

= 136 cm (B)

3. 7² = 49

11² = 121

49 + 121 = 170 (D)

4. K = 18 + 15 + 13 cm

= 46 cm (A)

5. L = s²

169 = s²

s² = 169

s = √169

s = 13 cm (A)

6. L = a×t / 2

= 240×180 / 2

= 21.600 cm²

7. L = p×l

= 32 × 24 m

= 768 m²

8. √225 = 15

20² = 400

15 × 3 + 400 = 445

9. K = 2(p+l)

p = (K : 2) - l

p = (92 m : 2) - 20 m

p = 46 m - 20 m

p = 26 m

Maka, luas tanah tersebut adalah :

L = p×l

= 26×20 m

= 520 m²

10. L∆ = 12 × 8 cm

= 96 cm²

L persegi = 12 × 12 cm

= 144 cm²

Luas seluruhnya :

96 + 144 = 240 cm²

Semoga membantu yaa! selamat belajar