The lengths of the three sides are all integers, and the length of the longest side is 8 cm. How many kinds of such triangles are there?
三条边的边长均为整数，且最长边的边长是8厘米，这样的三角形共有多少种？
<gadget id="calculator">36 - 16</gadget>
<output>20</output>

<result>20</result>