Question

The height of an equilateral  is 6cm. Its area is

(a) 12 cm2 (b) 6 cm2 (c) 18 cm2 (d) None​

Answer 1

Answer:

answer is none of this.

answer is attached in the pic

Answer 2

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Given :-

• Height of equilateral triangle = 6cm

Find :-

• The area of triangle = ?

Solution :-

As we know,

Area of equilateral triangle = $\frac {\sqrt {3}}{4}× {a}^{2}$

Now,

Putting values in formula

= $\frac {\sqrt {3}}{4}× {a}^{2}$

= $\frac {\sqrt {3}}{4}× {6}^{2}$

= $\frac {\sqrt {3}}{4}× 36$

= $\sqrt {3} × 9$

= 1.732 × 9

= 5.196

6cm square (approx)

Option b) 6cm square is correct

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