The perimeter of a right triangle is 26cm, the lengths of the two sides are 8cm and 5.5cm, what is the length of the hypotenuse in centimeters?
一个直角三角形周长是26cm，两条直角边长是8厘米和5.5cm，斜边长多少厘米．
<gadget id="calculator">26 - 8 - 5.5</gadget>
<output>12.5</output>

<result>12.5</result>