Find the area of an equilateral triangle each of whose side measures(1) 18cm (2)20cm Take root 3 as 1.73
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140.13 cm² , 173cm²
✯ Case 1
➭ We know that sides of equilateral Δs are equal.
We will use here formula :-
_________________[Put Values]
Area = √3 * (18)²/4
⇒ Area = √3 * 324 / 4
⇒ Area = 1.73 * 324/4
⇒ Area = 140.13
⇒ Area = 140.13 cm²
✯ Case 2
➭ We know that sides of equilateral Δs are equal.
We will use here formula :-
_________________[Put Values]
Area = √3 * (20)²/4
⇒ Area = √3 * 400 / 4
⇒ Area = 1.73 * 400/4
⇒ Area = 173
⇒ Area = 173 cm²
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