An isosceles trapezoid has three sides whose lengths are 48 cm, 28 cm, and 10 cm, and whose bottom is the longest side. So, what is the perimeter of this isosceles trapezoid in centimeters?
一个等腰梯形有三条边的长分别是48厘米、28厘米、10厘米，并且它的下底是最长的一条边．那么，这个等腰梯形的周长是多少厘米．
<gadget id="calculator">28 * 2</gadget>
<output>56</output>

<gadget id="calculator">10 + 56 + 48</gadget>
<output>114</output>

<result>114</result>