S triangle =ah÷2
=8×6÷2
=48÷2
= 24(c 132 1)
S parallelogram =2S triangle
=2×24
= 48(c 132 1)
S parallelogram = ah
h = s \a
=48÷ 10
=4.8 cm
S trapezoid =(a+b)h÷2
=( 10+ 16)×4.8÷2
=26×4.8÷2
= 62.4(c 132 1)
So the area of the shaded part is: S=S trapezoid -S triangle.
=62.4-24
= 38.4(c 132 1)