The area of a triangle is one half base times height. In the case of a right triangle, the base is one leg and the height is the other leg. (The two legs being separated by the right angle.)
As with all triangles: base x height ------------------ 2 Base is one side of the triangle, and height is a line drawn perpendicular from it to the opposite vertice (corner). If you want to get into...
The area of a right angled triangle would be .5 * length *width where the length is the height of the triangle. To find the height of the triangle, take the sine of 45 degrees, which is the degree of...