Question

The height of an equilateral triangle is 15cm and its perimeter is 36cm. Find the area of the triangle

Answer 1

Answer:

90 sq.cm.

Step-by-step explanation:

For an equilateral triangle, all sides are equal.

∴ Length of one side = Perimeter / 3 = 36/3 cm = 12 cm.

Now, area of triangle = Base * Height / 2.

Here, base = 12 cm and height = 15 cm.

∴ Area = 12 * 15 / 2 sq.cm. = 90 sq.cm.

Answer 2

Answer:

90 sq.cm.

Step-by-step explanation:

perimeter = add all sides one side = p/3 36/3 =12

base = 12

area = half of base * height

half of 12=6*15 = 90 sq.cm.