Question

plz help ...question number 20

Answer 1

Answer:

100 cm^2

Step-by-step explanation:

Area of ACGE = L×B

= 10×12

= 120cm^2

Area of Both triangle (HGF)(CBD)

= L×B ( when u join them it will be rectangle)

=4×5

=20 cm^2

Area of shaded portion

= area of rectangle - area of Both triangles

= 120-20 cm^2

= 100 cm^2

Area of shaded region =100 cm^2

Answer 2

Answer:

$100 cm^{2}$

Step-by-step explanation:

Area of shaded portion = Area of the rectangle - (Area of both triangles)

Area of rectangle = 12 × 10 = 120 $cm^{2}$

Area of triangle 1 = $\frac{1}{2}$ × 5 × 4

                            = 10 $cm^{2}$

Area of triangle 2 = Area of triangle 1

So, Total area = 120 - (10 + 10)

                       = 100 $cm^{2}$

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