# 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:

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The Pythagorean theorem is the base for the right triangle calculator.

Calculation of an isosceles triangle.

See also our trigonometric triangle calculator.

Calculation of an isosceles triangle.

See also our trigonometric triangle calculator.

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