1.

7. Find the area of the equilateral trianglewhose each side is:(i) 12 cm, (ii) 5 cm​

Answer»

Step-by-step explanation:

Answer:−

62.28 cm² , 10.81cm²

{\mathfrak{\underline{\underline{\blue{Step-By-Step-Explanation:-}}}}}

Step−By−Step−Explanation:−

✯ CASE 1

➭ We know that sides of equilateral Δs are equal.

We will use here formula :-

\large{\underline{\BOXED{\bf{\orange{Area \: of \: equilateral \: {\triangle} \: = \: {\frac{{\sqrt{3}}}{4}} {\TIMES} Side^{2}}}}}}

Areaofequilateral△=

4

3

×Side

2

_________________[Put Values]

Area = √3 * (12)²/4

⇒ Area = √3 * 144 / 4

⇒ Area = 1.73 * 144/4

⇒ Area = 62.28

⇒ Area = 62.28 cm²

\large{\star{\boxed{\boxed{\bf{\purple{Area \: = \: 62.28^{2}}}}}}}⋆

Area=62.28

2


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