Jawaban:
C. 25 CM
Penjelasan dengan langkah-langkah:
∆BCD
BD=√BC²+CD²
BD=√12²+9²
BD=√144+81
BD=√225
BD=15
∆ABD
AD=√AB²+BD²
AD=√20²+15²
AD=√400+225
AD=√625
AD=25
AD = 25 cm
AD² = DC² + BC² + AB²
= 9² + 12² + 20²
= 81 + 144 + 400
= 625
AD = √625 = 25 cm
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Jawaban:
C. 25 CM
Penjelasan dengan langkah-langkah:
∆BCD
BD=√BC²+CD²
BD=√12²+9²
BD=√144+81
BD=√225
BD=15
∆ABD
AD=√AB²+BD²
AD=√20²+15²
AD=√400+225
AD=√625
AD=25
AD = 25 cm
Penjelasan dengan langkah-langkah:
AD² = DC² + BC² + AB²
= 9² + 12² + 20²
= 81 + 144 + 400
= 625
AD = √625 = 25 cm