Question

Find the area of an equalitral triangle each of whose side is 10 cm
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Answer 1

Answer:

answer is 30

Step-by-step explanation:

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Answer 2

Given :

• equalitral triangle each of whose side is 10 cm

To Find :

• the area of an equalitral triangle

Solution :

We have side of an equalitral triangle (a). = 10 cm

[tex\boxed{Area\:of\:an\:Equilateral\:Triangle\frac{√3}{4}\:a²} [/tex]

By substituting values,

$\huge\sf\implies$ $\frac{√3}{4} (10)²$

$\Huge\sf\implies$ $\frac{√3}{4} (100)$

$\Huge\sf\implies$ 25 √3cm²[/tex]

Therefore,

Area of equilateral triangle is 25√3cm²

$\bold\color{red}{More\: Information}$

$\begin{gathered}\footnotesize{\boxed{\begin{array}{cc}\star\Area\:of\: Rectangle\:(l\:×\:b)\\\star\Area\:of\:square\:(side\:×\:side)\\\star\Area\:of\: Equilateral\:triangle\:(√3/4 \:a²)\\\star\Area\:of\:Triangle\:=\:1/2\:×\:base\: height\\\star\Area\:of\: Trapezoid\:=\:1/2\:(a\:+\:b)\:×\:h\\\star\Area\:of\:Circle\:=\:πr²\end{array}}}\end{gathered}$