Penjelasan dengan langkah-langkah:
• Rumus Teorema Phytagoras
AB = AC²+CB²
= 12²+5²
= 144+25
AB = ²√169
= 13 cm.
CD = CB²-BD²
= 5²-4²
= 25-16
CD = ²√9
= 3 cm.
AD = AC+CD
= 12 cm + 3 cm
AD = 15 cm.
jadi,
AD = 15 cm
BD = 4 cm
AB = 13 cm
L = AD+BD+AB
= 15+13+4
= 28+4
L = 32 cm²
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Penjelasan dengan langkah-langkah:
• Rumus Teorema Phytagoras
mencari AB,
AB = AC²+CB²
= 12²+5²
= 144+25
AB = ²√169
= 13 cm.
mencari CD,
CD = CB²-BD²
= 5²-4²
= 25-16
CD = ²√9
= 3 cm.
mencari AD,
AD = AC+CD
= 12 cm + 3 cm
AD = 15 cm.
jadi,
Diketahui :
AD = 15 cm
BD = 4 cm
AB = 13 cm
jawab :
L = AD+BD+AB
= 15+13+4
= 28+4
L = 32 cm²
jadi,luas bangun ABCD adalah 32 cm² (A)
SEMOGA BERMANFAAT TERIMAKASIH
jadikan jawaban tercerdas ya