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Q. 3.     Find the missing values:

             

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We know that

Area of triangle  = \frac{1}{2}\times base \times height

a) Here, the base and area of the triangle is given 

\Rightarrow 87= \frac{1}{2} \times 15 \times height

\Rightarrow height = \frac{87}{7.5}= 11.6 \ cm

b) Here height and area of the triangle is given 

\Rightarrow 1256= \frac{1}{2}\times 31.4 \times base

\Rightarrow base = \frac{1256}{15.7}=80 \ mm

c) Here base and area of the triangle is given 

\Rightarrow 170.5= \frac{1}{2} \times 22 \times height

\Rightarrow height = \frac{170.5}{11}=15.5 \ cm

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Riya

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