Area of an equilateral triangle
A = 1/4(s^2 * (sqrt(3))
what is approximate area of triangle if each side is 36 inches long
3 answers
Draw a line from the middle of one side to the opposite apex.
That will give you a right triangle with the base being 18 inches and the hypotenuse being 36 inches.
Use the Pythagorean Theorem to find the height of the triangle.
Then use this formula:
A = 1/2bh
That will give you a right triangle with the base being 18 inches and the hypotenuse being 36 inches.
Use the Pythagorean Theorem to find the height of the triangle.
Then use this formula:
A = 1/2bh
You could use (1/2) ab sinØ where a and b area two sides and Ø is the angle between them , so
Area = (1/2)(36)(36)sin60Ø
= (1/2)(36^2)(?3/2) which is the same as helper's answer and Ms Sue' answer.
The answer if 72 is not correct.
Area = (1/2)(36)(36)sin60Ø
= (1/2)(36^2)(?3/2) which is the same as helper's answer and Ms Sue' answer.
The answer if 72 is not correct.
6 answers