Question

Find the height of an equilateral triangle having side 15cm.

Answer 1

Answer:

there is must be area or perimeter not height of an equilateral triangle if it is perimeter I can tell

Step-by-step explanation:

perimeter of a triangle is = side + side+ side

perimeter of a triangle is = 15+15+15

perimeter of a triangle is= 55

Answer 2

Answer:

frnd below lies ur ans

Step-by-step explanation:

Drop perpendicular from one vertex to opposite side.

You now have two triangles with base =15/2 , height =h , hypotenuse =15

Using Pythagorean theorem, we get:

(152)2+h2=152

1524+h2=152

h2=152⋅(1−14)

h2=152⋅(34)

h=153−−√2 cm≈12.9904 cm

In general, an equilateral triangle with side length =s has height

h=s3–√2

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