OE |
AD |
OE |
BC |
1 |
AD |
1 |
BC |
2 |
EF |
OE |
BC |
AO |
AC |
OD |
BD |
OF |
BC |
OE |
AD |
BE |
AB |
OE |
BC |
AE |
AB |
OE |
AD |
OE |
BC |
AE+BE |
AB |
AB |
AB |
1 |
AD |
1 |
BC |
1 |
2 |
2OE |
EF |
1 |
AD |
1 |
BC |
2OE |
EF |
1 |
AD |
1 |
BC |
2 |
EF |
A.72.8 cm | B.51 cm | C.36.4 cm | D.28 cm |
A.只有一组对边平行的四边形是梯形 |
B.矩形可以看作是一种特殊的梯形 |
C.梯形有两个内角是锐角,其余两个角是钝角 |
D.梯形的对角互补 |
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