Isosceles Triangle Calculator and Solver

Calculators to solve isosceles triangle problems depending on which sides and angles you given. The figure shown below will be used for sides and angle notations.
An isosceles triangle has two sides that are equal called legs. In the triangle below sides AC and AB are equal. Since the legs are equal, the base angles B and C are also equal. Angle A is called the vertex. Side BC is called the base.

isosceles triangle used for notation

Calculator 1 - You know base a and leg b (which is equal to c)

How to use the calculators

Enter base a and leg b (or c since they are equal) as positive real numbers and press "calculate".

base a = leg b =
leg c =
angle A = degrees
angle B = degrees
angle C = degrees
area =
perimeter =



Calculator 2 - You know angle A and leg b (which is equal to c)

How to use the calculators

Enter angle A in degrees and leg b (or c) as positive real numbers and press "calculate".

angle A = leg b =
leg c =
base a =
angle C = degrees
angle B = degrees
area =
perimeter =



Calculator 3 - You know base a and angle A at the vertex

How to use the calculators

Enter base a and angle A in degrees as positive real numbers and press "calculate".

base a = angle A =
leg b =
leg c =
angle B = degrees
angle C = degrees
area =
perimeter =



Calculator 4 - You know base angle C and leg b (or c)

How to use the calculators

Enter angle C in degrees and leg b as positive real numbers and press "calculate".

angle C = leg b =
leg c =
base a =
angle A = degrees
angle B = degrees
area =
perimeter =



Calculator 5 - You know angle base C and base a

How to use the calculators

Enter the angle base C and the base a and press "calculate".

angle C = base a =
leg b =
side c =
angle A = degrees
angle B = degrees
area =
perimeter =



More References and links

More Online Geometry Calculators and Solvers.

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