Question

panjang diagonal suatu persegi 8 cm panjang sisi persegi tersebut adalah ​

Answer 1

Jawaban:

Penyelesaian :

panjang diagonal suatu persegi 8 cm, panjang sisi persegi tersebut adalah ...

• diagonal = 8 cm
• sisi = ...

Mencari panjang sisi

[tex] \sf {s}^{2} = \frac{ { diagonal}^{2} }{2} \\ [/tex]

[tex] \sf {s}^{2} = \frac{ {8}^{2} \: cm }{2} \\ [/tex]

[tex] \sf {s}^{2} = \frac{64 \: cm}{2} \\ [/tex]

[tex] \sf {s}^{2} = 32 \: cm[/tex]

[tex] \sf s = \sqrt{32} \: cm [/tex]

[tex] \sf s = \sqrt{16 \times 2} [/tex]

[tex] \sf s = \sqrt{16} \times \sqrt{2} [/tex]

[tex] \sf s = 4 \sqrt{2} \: cm [/tex]

Answer 2

S = √D²/2

= √8²/2

= √(8(8)/2

= √64/2

= √32

= √16.2

= √4².2

= 4√2 CM