A.梯形 | B.矩形 | C.菱形 | D.正方形 |
AB |
DC |
AB |
DC |
AD |
AB |
AD |
AB |
13 |
AD |
80 |
AB |
c |
BC |
a |
CA |
b |
a |
b |
a |
b |
a |
b |
b |
c |
c |
a |
b |
c |
A.1 | B.2 | C.3 | D.4 |
OA |
OB |
OM |
PA |
PB |
OP |
a |
b |
x |
y |
a |
y |
x |
b |
x |
y |
a |
b |
a |
b |
a |
b |
x |
y |
x |
y |
a |
b |
2 |
2 |
a |
b |
8 |
5 |
π |
4 |
π |
2 |
π |
4 |
π |
4 |
sin2x(1+tanx) |
1-tanx |
AP |
PB |
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