Bianca is 4'12, cause brian is 4'6, brianna is 3 inches taller so thats 4'9, Bianca is 3 inches taller than Brianna so she is 4'12
Just add three each time, 6+3=9 9+3=12
Area of a triangle= 1/2 (ab) (sin C)
= 1/2 (9 x 11.5) (sin 63.4)
= 46.27
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