Penjelasan dengan langkah-langkah:

13. 120+4x = 180

4x = 60

x = 15⁰

12. 50+2x = 180

2x = 130

x = 65⁰

11. X+Y+Z = 180

2x+10 + 60 + 3x+10 = 180

5x + 80 = 180

5x = 100

x = 20⁰

Z = 3x + 10 = 70⁰

10. Keliling = AB+BC+AC

= 4+3+6 = 13

9. AZ dan CY

8. Keliling persegi panjang = 2 (p + l)

66 = 2 (2x+5 + 8)

66 = 2 (2x + 13)

33 = 2x + 13

2x = 20

x = 10

Luas persegi panjang = p x l

= (2x+5) × 8

= 25 × 8

= 200 cm²

5. Luas taman persegi panjang = p × l = 8 × 2 = 16 m²

Luas kolam persegi = luas taman = 16 m²

Luas kolam persegi = s² = 16 m²

s = 4m

Keliling kolam persegi = 4s = 4 × 4 = 16 m

Jadikan tercerdas ya, banyak bet hehehh