Given the coordinates of the three vertices of the triangle 2.11.03.0, the sine value of the ball angle B and the area of the triangle
You can draw a coordinate system to mark the points
A(2,1)
B(1,0)
C(3,0)
The perpendicularity of the x-axis through a intersects at point (2,0)
And ab = root 2
We can find SINB = root 2 / 2
S△ABC=1
The key is to draw pictures and combine figures with figures,
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