CALCULATOR
Isosceles Triangle Base Angle from Apex Angle Calculator
Isosceles Triangle Base Angle from Apex Angle. Example: Angle in degrees: 40 degrees gives 70 degrees. Supplied angle is the apex between equal legs; returns either equal base angle. Only this original stated job is proposed, not full historical source coverage. Input domains and output unit must be visible.
Supplied angle is the apex between equal legs; returns either equal base angle. Only this original stated job is proposed, not full historical source coverage. Input domains and output unit must be visible. Derivation: Triangle sum180° and equality of two base angles.
Accepted inputs: Angle in degrees: 0.001 to 179.999 degrees.
How the calculation works
base angle=(180-apex)/2
Worked example
With angle in degrees 40 degrees, isosceles triangle base angle from apex angle is 70 degrees.
Assumptions and limits
Supplied angle is the apex between equal legs; returns either equal base angle. Only this original stated job is proposed, not full historical source coverage. Input domains and output unit must be visible. Derivation: Triangle sum180° and equality of two base angles.