5. Two triangular pieces ABC and BCD of paper are joined together form a big triangle ABD as shown in the adjoining figure. Find the area of triangle ABD.
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kunalvidhani11:
answe 28.25 cm
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Answer:
area of triangle ABC=1/2*base*height
=1/2*10*5.5
=27.5cm^2
area of Triangle BCD=1/2*base*height
=1/2*18*5.5
=49.5cm^2
Now, Area of triangle ABD=area of triangle ABC + area of Triangle BCD
=27.5+49.5=77cm^2
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