Page 47 - Modul Elektronik Bangun Datar Segi Empat_Neat

= 24 cm

= 20 cm =

Ditanya : ?

Jawab :

L = × d × d
2 1 2

L = × x
2

300 = × 24 x
2

300 = 12

= 25
=
2

= OC = = 24 = 12
2 2
2 2
= −

2 2
= 20 − 12 = 400 − 144 = 256 = 16

= – = 25 cm – 16 cm = 9 cm

√ 2
2
= +
2 2
= 9 + 12 = 81 + 144 = 225 = 15

Jadi, panjang sisi yaitu 15 cm

 Evaluasi

1. Diketahui :

Bangun I : s = 4 cm
1

Bangun II : = 4 + 2 = 6

= 8 − 4 − 2 = 2

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Bangun Datar Segi Empat - VII