Question

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Answer 1

Answer:

13cm

Step-by-step explanation:

We know that the formula for altitude of equuilateral triangle is h=√3a/2

Where, a is the side of the triangle.

So,

h=√3×15/2

 =7.5√3

 =12.99

 =13cm (approx)

Answer 2

Step-by-step explanation:

We know that the formula for altitude of the equilateral traingle is

$\frac{ \sqrt{3} }{2} \times a = h$

Here a is the side of the equilateral Triangle.

Putting the value of A

$\frac{ \sqrt{3} }{2} \times 15 = h \\ \\ = \frac{15 \sqrt{3} }{2} = h \\ \\ 7.5 \sqrt{3} = h$

Now,putting the value of √3 as 1.73 (approx)

$7.5 \times 1.73 = h \\ \\ 12.975 \: \: \: {cm}^{2} (approx) = h$