Penjelasan dengan langkah-langkah:

RANDOM

1. 2s = 48 – 8 – 20

2s = 20

s = 10 m

t = √(10² – [(20–8)/2]²)

t = √(100 – 36)

t = √64

t = 8 m

Harga tanah seluruhnya = Luas × per m²

= (8 + 20) × 8 × 125.000

2

= 14 × 1.000.000

= Rp. 14.000.000,00

2. < BAC = 110° – 50°

< BAC = 60°

3. Jarak tempuh = 5 × Keliling

= 5 × 2 × (26 + 14)

= 10 × 40

= 400 meter

4. 2x – 1 + x + 3 + 3x – 1 = 19

6x + 1 = 19

6x = 19 – 1

x = 18

6

x = 3 cm

5. t = √(39² – 15²) = √(1.521 – 225)

t = √1.296

t = 36 cm

Keliling = 39 + 36 + 3 × 15

Keliling = 75 + 45

Keliling = 120 cm