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Isosceles Triangle Calculator
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Isosceles Triangle Calculator is an online tool to calculate perimeter and area of isosceles triangle. Here it can calculate area only if height is given. Isosceles Triangle Calculator is a tool which makes calculations easy and fun. For calculating perimeter it is necessary that measures of base and equal side should be given, but for calculating area height is also needed.
 

Steps for Isosceles Triangle

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Step 1 :  

Take the equal sides of an isosceles triangle as "a" and base as "b". Height can be taken as "h" if given in the question, else, it can be found by Pythagorean theorem.



Step 2 :  

Apply the formula for Area of an Isosceles triangle =$\frac{1}{2}$×b×h



Step 3 :  

For perimeter, apply the formula P = 2×a + b



Example problems on Isosceles Triangle

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  1. Find the area of an isosceles triangle having equal sides 10cm and base 16cm.


    Step 1 :  

    Given:


    a = 10cm b = 16cm and h = √(a2 - (b/2)2 = √(100 - (b/2)2 = √(100 - 64) h = 6cm



    Step 2 :  

    Apply formula for area of an Isosceles triangle = $\frac{1}{2}$×b×h.


    Area of an Isosceles triangle= $\frac{1}{2}$×16×6.


    Area of an Isosceles triangle= 48cm2



    Answer  :  

    Area = 48cm2
    Perimeter = 36cm



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