Question

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Answer 1

Answer:

area of parallelogram = 16× 8 =128 cm^2

area of half parallelogram (triangle)=128/2= 64cm^2

1/2×10×x (AD)=64

5× x= 64

x=64/5

AD=64/5

Answer 2

Answer:

AD = 12.8 cm

Step-by-step explanation:

We all know that the area of parallelogram is equal to (length of side) x (length of perpendicular to it)

also opposite side of parallelogram are equal

AB = CD = 16cm

AE = 8 cm

CF = 10cm

Since are of parallelogram is constant

CD x AE = AD x CF

16 x 8 = AD x 10

AD = 16 x 8 ÷ 10

AD = 128 ÷ 10

AD = 12.8 cm