Question

find the area of a equadrilateral triangle having side 6 CM​

Answer 1

$\huge\bf{heya}$

1. 9 cm2. B.

2. 3 cm2. C.

3. 93 cm2. D

38 cm2. Medium. Answer. a=6cm, b=6cm, c=6cm. ∴s=2a+b+c=26+6+6=9cm. ∴ Area of the equilateral triangle. =s(s−a)(s−b)(s−c) =9(9−6)(9−6)(9−6) =9(3)(3)(3) =93 cm2.

Answer 2

GIVEN:

• Side of equilateral triangle is 6cm.

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TO FIND:

• Area of triangle

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SOLUTION:

✬ Area of equilateral triangle =√3/4 side²

➛ ‎ ‎ ‎√3/4 (6×6) cm²

➛ ‎ ‎ ‎√3/4×36 cm²

➛ ‎ ‎ ‎9√3 cm²

∴The area of equilateral triangle is 9√3cm².

MORE FORMULAE TO KNOW!

⇒ Area of rectangle=length×breadth

⇒ Area of square=Side²

⇒ Area of triangle=½×base×height

⇒ Area of circle=πr²

⇒ Perimeter of rectangle=2(L+B)

⇒ Perimeter of square=4×Side

⇒ Perimeter of circle=2πr