Calculation 81402

In an isosceles triangle, the side a=b= 21 cm, and the triangle's height is 19 cm. Find out the base and perimeter of the triangle (sketch, calculation, answer).

Correct answer:

c =  17.8885 cm
o =  59.8885 cm

Step-by-step explanation:

a=21 cm h=19 cm b=a=21 cm  a2 = h2 +(c/2)2  c=2 a2h2=2 212192=8 5=17.8885 cm
o=a+b+c=21+21+17.8885=59.8885 cm

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

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