Current location - Training Enrollment Network - Mathematics courses - The fifth question on page 46 of the second volume of the fourth grade mathematics classroom is refined.
The fifth question on page 46 of the second volume of the fourth grade mathematics classroom is refined.
Your answers are all wrong. The correct answer is:

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)