Question

find the area of triangle with a base of 40 and a height of 5? 30,35,20,66​

Answer 1

$\sf \large\underbrace{ \underline{Understanding \: concept}}$

As it is given that length of base and height of a triangle are 40cm and 5cm respectively,so we have to do only is to put these values in the formula to find area of ∆.

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Let's do it!

$\bf★ \: Area \: of \: ∆= \frac{1}{2} \times base \times height$

$\large \sf: \implies \: \: \frac{1}{2} \times 40 \times 5$

$\large \sf: \implies \: \: \cancel{ \frac{1}{2} \times 40} \times 5$

$\large \sf: \implies \: \:20 \times 5$

$\large \sf: \implies \: \:100$

So area of triangle is 100cm²

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$\sf \Large{ \underbrace{ \underline{More \: formulae \: to \: know!}}}$

$\sf \circ \: \: Perimeter \: of \: triangle=Sum \: of \: all \: sides$

$\sf \circ \: \: Area \: of \: rectangle=length×breadth$

$\sf \circ \: \: Area \: of \: square=side²$

$\sf \circ \: \: Area \: of \: circle=πr²$

$\sf \circ \: \: Perimeter \: of \: rectangle=2(length+breadth)$

$\sf \circ \: \: Perimeter \: of \: Square=4×Side$

$\sf \circ \: \: Perimeter \: of \: circle=2πr$