What Is the Formula for Finding the Area of an Isosceles Right Triangle?


Quick Answer

The formula is Area = ½ times (Base times Height) or Area = (Base times Height) divided by 2. Finding the area of an isosceles or right triangle is easy as long as the length of the base and the height are known.

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Full Answer

With a right triangle, the base is the bottom length. The height is the straight, non-angled line attached to the base where the 90-degree angle is formed. The other two angles are 45 degrees.

If the Base is 5 inches times a Height of 10 inches, you get 50 inches. Divide that result by two to find the Area, which is 25 inches.

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