1 | 2 | 3 | |
| | |
n | 1 | 2 | 3 |
xn |
A.∠A=60°,AB=5cm,AC=10cm;∠A′=60°,A′B′=3cm,A′C′=10cm |
B.∠A=45°,AB=4cm,BC=6cm;∠D=45°,DE=2cm,DF=3cm |
C.∠C=∠E=30°,AB=8cm,BC=4cm;DF=6cm,FE=3cm |
D.∠A=∠A′,且AB·A′C′=AC·A′B′ |
A.0.36米2 | B.0.81米2 | C.2米2 | D.3.24米2 |
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