# Q. 4.     Find the missing values:

R Riya

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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