长方形ABCD的长为6厘米，宽为2厘米。经过点A做一条线段AE把长方形分成两部分，一部分是直角三角形。另一部分是梯形。如果梯形的面积是直角三角形面积的3倍，则梯形的周长与直角三角形周长的差是多少厘米？

A . 2.8厘米 B . 2.5厘米 C . 3.4厘米 D . 3.5厘米

A . 11 B . 12 C . 13 D . 14

A .https://assets.asklib.com/psource/1473067521587052930.png B .https://assets.asklib.com/psource/1473067529506089084.png C .https://assets.asklib.com/psource/1473067542460092061.png D .https://assets.asklib.com/psource/1473067556949063309.png

A .https://assets.asklib.com/psource/1473298595018038732.png B .https://assets.asklib.com/psource/1473298604311092377.png C .https://assets.asklib.com/psource/1473298612345004427.png D .https://assets.asklib.com/psource/1473298621645083771.png

A .https://assets.asklib.com/psource/1473216437671050185.png B .https://assets.asklib.com/psource/1473216445792046562.png C .https://assets.asklib.com/psource/1473216452553014519.png D .https://assets.asklib.com/psource/1473216460046072476.png

A . 7 B . 8 C . 9 D . 10

A .https://assets.asklib.com/psource/1473666831662029092.png B .https://assets.asklib.com/psource/1473666841972094146.png C .https://assets.asklib.com/psource/1473666847401076763.png D .https://assets.asklib.com/psource/1473666852142004173.png

A .https://assets.asklib.com/psource/1473407867390067822.png B .https://assets.asklib.com/psource/1473407873143078107.png C .https://assets.asklib.com/psource/1473407882216023184.png D .https://assets.asklib.com/psource/1473407890512087836.png

A .https://assets.asklib.com/psource/1472799535538077335.png B .https://assets.asklib.com/psource/1472799541028098888.png C .https://assets.asklib.com/psource/1472799587669035965.png D .https://assets.asklib.com/psource/1472799592735023114.png

A .https://assets.asklib.com/psource/1473744590804029386.png B .https://assets.asklib.com/psource/1473744598675051791.png C .https://assets.asklib.com/psource/1473744605952049414.png D .https://assets.asklib.com/psource/1473744613181071885.png

A .https://assets.asklib.com/psource/1473642793030026045.png B .https://assets.asklib.com/psource/1473642800831032215.png C .https://assets.asklib.com/psource/1473642809512081300.png D .https://assets.asklib.com/psource/1473642817936093712.png

A .https://assets.asklib.com/psource/1471854350814098425.png B .https://assets.asklib.com/psource/1471854359343040297.png C .https://assets.asklib.com/psource/1471854367167055076.png D .https://assets.asklib.com/psource/1471854374690038072.png

A .https://assets.asklib.com/psource/1473651218046094669.png B .https://assets.asklib.com/psource/1473651224589023430.png C .https://assets.asklib.com/psource/1473651231849071476.png D .https://assets.asklib.com/psource/1473651240977051669.png

<img src='https://img2.soutiyun.com/shangxueba/ask/3342001-3345000/3342406/ct_kmbacom_kmbacochoose_00014(20096).jpg' /> A．300 B．192 C．150 D．96 E．以上结论均不正确

<img src='https://img2.soutiyun.com/ask/uploadfile/2511001-2514000/5c7370840c8cda342de620ef6735d1c5.jpg' /> <img src='https://img2.soutiyun.com/ask/uploadfile/2511001-2514000/4c7f983e74ab6398aeb124c1096da229.gif' />

<img src='https://img2.soutiyun.com/ask/uploadfile/2256001-2259000/4fc3fa773ba3ff1b4a790c7f86a536e7.jpg' /> A．6 B．3 C．2 D．4

<img src='https://img2.soutiyun.com/ask/uploadfile/3192001-3195000/b4c5ab54842c679f5fec7646150eb219.jpg' /> <img src='https://img2.soutiyun.com/ask/uploadfile/3192001-3195000/8e39b27379b48e7332f87d969fd12235.gif' />

A．（7+6+4）×4 B．7×6×4 C．（7×6+7×4+6×4）×2

A．相同 B．不同 C．视情况而定 D．不能进行比较

A．6平方厘米 B．6平方分米 C．60平方厘米

A．75x B．75−x C．75÷x