Li Ming surrounded a triangle with a 1m long iron wire. One side of the triangle was measured to be (1/4)m, and the other side was (1/2)m. How long is the third longest side in meters? What kind of triangle is it?
李明用一根1m长的铁丝围了一个三角形，量得三角形的一条边是(1/4)m，另一条边是(1/2)m，第三长边长多少米？它是一个什么三角形？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/4) - (1/2)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>