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t² = 4-1
t² = 3
t = √3
Luas segitiga = a.t/2
= 2.√3/2
= √3 cm²
maaf kalau salah
t = √2kuadrat - 1kuadrat
t = √3
t = 1,73
luas segitiga = 1/2 * t * a
1/2 * 1,73 * 2
1,73 *1
= 1,73