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Nguyenthinhuy342
4 tháng trước

1,Cho tam giác ABC có AB=8cm, AC=6cm, góc A=30 độ. Tính diện tích tam giác ABC

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Anhthu Trancam
4 tháng trước
A= 30 độ AB= 8cm, AC= 6cm Diện tích của tam giác ABC là: SABC=1:2AC×ABsin30độ = 12 cm
Huyydaychuai
4 tháng trước

Đáp án:

`S_(ABC) = 1/2 . AB . AC . sinA`$\\$ `S_(ABC) = 1/2 . 8 . 6 . sin30°` $\\$ `S_(ABC) = 12 ( cm^2)` $\\$ Vậy diện tích tam giác `ABC` là `12 cm^2`

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