1. \; S_{BCD}=\frac{1}{2}S_{ABC}=\frac{12}{2}=6

6

2. \; S_{ABG}=\frac{3}{5}S_{ABD}=\frac{18}{5}

3,6

3. \; S_{AGD}=\frac{2}{5}S_{ABD}=\frac{12}{5}

2,4

A = Intersect(xAxis, yAxis)
B = (8, 0)
C = (9, 3)
t1, c, a, b = Polygon(A, B, C)
D = Midpoint(b)
f = Segment(D, B)
E = Point(c)
g = Line(D, E)
F = Point(c)
h = Line(F, g)
G = Intersect(h, f)
t2, g_1, a_1, b_1 = Polygon(A, B, G)