What is the formula for square footage of a triangular room?

Answer 1

The formula for finding the square footage of a triangular room is the same as for finding the area of any triangle: Atriangle = 1/2 x Base x Height To do the calculation, first measure a side. If you have a 90 angle at one vertex of your triangle, you're almost home. Measure the two sides that form the 90 angle, multiply them together, and divide that by two. That's your area. If not, plan B is what you'll use. You'll need your tape measure and a square (preferably a good sized one) to do this. Pick a side that is between two angles that are less than 90 degrees, and measure it. Now you'll need to lay a string between the "other" vertex and the side you just measured. That string should intersect the side you measured at a point such that the string is perpendicular to the measured side. Measure the distance along the string. It will be the distance from a vertex to the measured side, and will be the height of the triangle. Again, multiply the length of the base times the height and you'll get your area. If you don't have a square but have a helper, have the helper hold the string securely at that vertex opposite your measured side. Take the string and move along that measured side holding it against the wall. Keep the string snug. As you move closer to the perpendicular point, your string will get shorter. Move "through" or away from the perpendicular and you'll be lengthening the string to keep it against the wall. In this way, you can find the perpendicular without the square. With the dimensions in hand, make your calculation.