Isosceles Triangle Calculator

Base must be less than twice the equal-side length.

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Result

Enter your values and run the tool to see your result.

Check the units, enter your values, and run the tool. Results follow the assumptions and method below.

Heightsqrt(equal^2-base^2/4)

Areabase*sqrt(equal^2-base^2/4)/2

Perimeter2*equal+base