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    What Is This Tool?

    Triangle Calculator is for students and anyone checking a triangle from three known side lengths. It finds the area, perimeter, largest angle in degrees and triangle type.

    Privacy and Security

    The numbers you enter in the Triangle Calculator (side a, side b, side c and so on) are calculated in your browser. They are not sent to or saved on Adobe IQ servers, and they disappear when you close the page.

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    How to use this tool

    • Enter your side a and side b.
    • Fill in the remaining fields of the Triangle Calculator.
    • Read your area and perimeter instantly.

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    All Calculators

    Triangle Calculator

    Three side lengths. Angles and area are worked out from those sides only.

    Result

    Area
    14.7
    Perimeter
    18
    Largest angle (degrees)
    78.46
    Triangle type
    Scalene, acute triangle