Assuming that what you call a "traingle" is actually a triangle, the formula is that one of the vertices has a measure of 90 degrees.
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Assuming that a traingle is meant to be a triangle, then the answer is none.
The only formula you need is one that we're sure you already know.In every right triangle,(leg-A)2 + (leg-B)2 = (hypotenuse)2In this right triangle, the legs are equal, and the hypotenuse is 10.(leg)2 + (leg)2 = (10)22 times (leg)2 = 100Can you take it from there ?
isosceles right angle traingle
A traingle covers half the area of a rectangle with the same base and [perpendicular] height.
Yes, but it would have to be a triangle, not traingle!