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1/2 = b/6
2b=6
b= 3
c= √6²-b²
c= √36-3²
c= √36-9
c= √27
c= 3√3
Jadi panjang b=3 dan dan panjang c= 3√3 <------- jawaban
4) Luas trapesium = 1/2 × jumlah sisi sejajar x tinggi
Sisi atas = 12
tinggi = sisi atas= 12
sisi miring= 13
Alas siku-siku= √13²-12²
....................= √169-144
....................= √25
...................= 5
Jadi Luas trapesium
= 1/2 (12 + (12+5+5))× 12
= 1/2 (12+22) ×12
= 1/2×34×12
= 17×12
= 204 <------ jawaban
"Mohon jadikan sbg jawaban terbaik ya,,,"