A triangle has side lengths of 172m, 155m, and 200m. calculate the area.

this is imposible uless it is a right triuabgle. You need to knw the height.

formula is:
b*h
A= ----
2

Use Heron's formula. Given sides a, b, c of a triangle, let s = (a+b+c)/2. Then A = sqrt(s(s-a)(s-b)(s-c))

To calculate the area of a triangle, you can use Heron's formula. Heron's formula states that the area of a triangle with sides a, b, and c can be calculated using the following formula:

Area = √(s * (s - a) * (s - b) * (s - c))

Where s is the semi-perimeter of the triangle, which is calculated by adding the lengths of all three sides and dividing the sum by 2.

In this case, the sides of the given triangle are 172m, 155m, and 200m. To calculate the area, we first need to calculate the semi-perimeter, s.

s = (172 + 155 + 200) / 2
s = 527 / 2
s = 263.5

Now that we have the semi-perimeter, we can calculate the area using Heron's formula:

Area = √(263.5 * (263.5 - 172) * (263.5 - 155) * (263.5 - 200))

Calculating this expression will give us the area of the triangle.