Isosceles triangle

Calculate the size of the interior angles and the length of the base of the isosceles triangle if the arm's length is 17 cm and the height to the base is 12 cm.

Correct answer:

A =  44.9009 °
B =  44.9009 °
C =  90.1982 °
c =  24.0832 cm

Step-by-step explanation:

r=17 cm h=12 cm  sinA=h:r  A=π180°arcsin(h/r)=π180°arcsin(12/17)=44.9009=44°543"
B=A=44.9009=44.9009=44°543"
C=180AB=18044.900944.9009=90.1982=90°1154"
(c/2)2+h2=r2  c=2 r2h2=2 172122=2 145=24.0832 cm

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Tips for related online calculators
The Pythagorean theorem is the base for the right triangle calculator.
See also our trigonometric triangle calculator.

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