3. Perhatikan gambar berikut! А ? 20 cm D 9 cm 12 cm B C Panjang AD adalah ... cm. a. 15 c. 21 b. 17 d. 25
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Jawaban:
d. 25 cm
Penjelasan dengan langkah-langkah:
Segitiga BCD
Sisi miring BD = √BC² + DC²
= √12² + 9²
= √144 + 81
= √215
= 15 cm
Segitiga ABD
Sisi miring AD = √AB² + BD²
= √20² + 15²
= √400 + 215
= √615
= 25 cm
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