Question

Find the area of a triangle base: 21 cm and height 15 cm

Answer 1

Given :

• Base of triangle is 21 cm.
• Height of Triangle is 15 cm.

To Find :

• Area of Triangle.

Solution :

$\longmapsto\tt{Base=21\:cm}$

$\longmapsto\tt{Height=15\:cm}$

Using Formula :

$\longmapsto\tt\boxed{Area\:of\:Triangle=\dfrac{1}{2}\times{b}\times{h}}$

Putting Values :

$\longmapsto\tt{\dfrac{1}{2}\times{21}\times{15}}$

$\longmapsto\tt{\cancel\dfrac{315}{2}}$

$\longmapsto\tt\bf{157.5\:{cm}^{2}}$

So , The Area of Triangle is 157.5 cm²..

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1. Area of Triangle = 1/2 × b × h

Here ,

• b = base of Triangle.
• h = height of Triangle.

2. Perimeter of Triangle = a + b + c

Here ,

• a , b and c are three sides of Triangle.

_______________________

Answer 2

Given :-

• Base Of Triangle = 21cm.

• Height Of Triangle = 15cm.

To Find :-

• Area Of Triangle.

Solution :-

We know that,

$\sf{Area \: of \: \triangle \: = \dfrac{1}{2} \times Base \times Height }$

Now, Put the values.

$\implies \: \sf{ \dfrac{1}{2} \times 21 \times 15}$

$\implies\sf{ \dfrac{315}{2} }$

$\implies\boxed{\bf\red{157.5c {m}^{2} }}$

Hence, Area Of Triangle = 157.5cm².