For all triangles: area = 1/2 * base * height
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To find the circumradius of an isosceles triangle, the formula is:1/8[(a^2/h)+4h]in which h is the height of the triangle and a is the base of the triangle.
For all triangles: area = 1/2 * base * height
there is no specific formula for isos triangle..... 1/2bh..which means 1/2xbasexheight is the formula for all types of triangles.....so if we take isos as a triangle we can use this formula to calculate the area of the figure!
You cannot since there is not sufficient information.
You can use trigonometry to find the height of the triangle. Then just use the well-known formula: area = (1/2) times base times height. You can also use Heron's Formula, which works for any triangle, if you know the three sides.