1/5单选题
难度：
1.若△ABC∽△DEF，相似比为1：2，且△ABC的面积为2，则△DEF的面积为（ ）
| A | 16 |
| B | 8 |
| C | 4 |
| D | 2 |
- 提示1：
- 5qC55o2u55u45Ly85LiJ6KeS5b2i55qE6Z2i56ev55qE5q+U562J5LqO55u45Ly85q+U55qE5bmz5pa56L+b6KGM6K6h566X77yO
正确答案：Qg==
6Kej77ya5qC55o2u6aKY5oSP5b6XPGltZyB3aWR0aD04NCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zNy9GRi9yQkFDRkZXYmxYV1JPeV9NQUFBREMyQnVONmM1NjUucG5nIj48YnI+5omA5LulUzxzdWI+4pazPC9zdWI+PHN1Yj5ERUY8L3N1Yj49NMOXMj0477yOPGJyPuaVhemAiULvvI4=
2/5单选题
难度：
2.已知，△ABC∽△DEF，△ABC与△DEF的面积之比为1：2，当BC=1，对应边EF的长是（ ）
| A |  |
| B | 2 |
| C | 3 |
| D | 4 |
- 提示1：
- 5qC55o2u55u45Ly85LiJ6KeS5b2i6Z2i56ev55qE5q+U562J5LqO55u45Ly85q+U55qE5bmz5pa55YiX5Ye65q+U5L6L5byP77yM5Luj5YWl5pWw5YC86K6h566X5Y2z5Y+v5b6X6Kej77yO
正确答案：QQ==
6Kej77ya4oi14pazQUJD4oi94pazREVG77yM4pazQUJD5LiO4pazREVG55qE6Z2i56ev5LmL5q+U5Li6Me+8mjLvvIw8YnI+4oi077yIQkPvvJpFRu+8iTxzdXA+Mjwvc3VwPj0x77yaMu+8jDxicj7op6PlvpdCQ++8mkVGPTHvvJo8aW1nIHdpZHRoPTE5IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzkxL0FGL3JCQUNKbFdibFhtUV9URDJBQUFCZTMxX1dlRTY5My5wbmciPu+8jDxicj7iiLVCQz0x77yMPGJyPuKItEVGPTxpbWcgd2lkdGg9MTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTEvQUYvckJBQ0psV2JsWG1RX1REMkFBQUJlMzFfV2VFNjkzLnBuZyI+PGJyPuaVhemAiUHvvI4=
3/5单选题
难度：
3.△ABC中，AB=12，BC=18，CA=24，另一个和它相似的三角形最长的一边是36，
| A | 27 |
| B | 12 |
| C | 18 |
| D | 20 |
- 提示1：
- 6K6+5Y+m5LiA5Liq5LiJ6KeS5b2i5pyA55+t55qE5LiA6L655piveO+8jOagueaNruebuOS8vOS4ieinkuW9ouWvueW6lOi+ueaIkOavlOS+i+WNs+WPr+W+l+WHuue7k+iuuu+8jg==
正确答案：Qw==
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
4/5单选题
难度：
4.两个相似三角形对应中线的比2：3，周长的和是20，则两个三角形的周长分别为（ ）
| A | 8和12 |
| B | 9和11 |
| C | 7和13 |
| D | 6和14 |
- 提示1：
- 5qC55o2u55u45Ly85LiJ6KeS5b2i55qE5a+55bqU57q/5q6177yI5a+55bqU5Lit57q/44CB5a+55bqU6KeS5bmz5YiG57q/44CB5a+55bqU6L655LiK55qE6auY77yJ55qE5q+U562J5LqO55u45Ly85q+U5b6X5Yiw5Lik5Liq55u45Ly85LiJ6KeS5b2i55qE5ZGo6ZW/55qE5q+U5Li6Mu+8mjPvvIzorr7ov5nkuKTkuKrkuInop5LlvaLnmoTlkajplb/liIbliKvkuLoyeO+8jDN477yM5YiZMngrM3g9MjDvvIznhLblkI7op6PmlrnnqIvmsYLlh7p45ZCO6K6h566XMnjlkowzeOWNs+WPr++8jg==
正确答案：QQ==
6Kej77ya4oi15Lik5Liq55u45Ly85LiJ6KeS5b2i5a+55bqU5Lit57q/55qE5q+UMu+8mjPvvIw8YnI+4oi05Lik5Liq55u45Ly85LiJ6KeS5b2i55qE5ZGo6ZW/55qE5q+U5Li6Mu+8mjPvvIw8YnI+6K6+6L+Z5Lik5Liq5LiJ6KeS5b2i55qE5ZGo6ZW/5YiG5Yir5Li6MnjvvIwzeO+8jDxicj7liJkyeCszeD0yMO+8jOino+W+l3g9NO+8jDxicj7iiLQyeD0477yMM3g9MTLvvIw8YnI+5Y2z5Lik5Liq5LiJ6KeS5b2i55qE5ZGo6ZW/5YiG5YirOOWSjDEy77yOPGJyPuaVhemAiUHvvI4=
5/5单选题
难度：
5.两相似三角形的最短边分别是5cm和3cm，它们的面积之差为32cm2，那么小三角形的面积为（ ）
| A | 10cm2 |
| B | 14cm2 |
| C | 16cm2 |
| D | 18cm2 |
- 提示1：
- 5qC55o2u55u45Ly85LiJ6KeS5b2i6Z2i56ev55qE5q+U562J5LqO55u45Ly85q+U55qE5bmz5pa577yM5Y+v5rGC5bCP5LiJ6KeS5b2i55qE6Z2i56ev5Li6MThjbTxzdXA+Mjwvc3VwPu+8jg==
正确答案：RA==
6Kej77ya5qC55o2u6aKY5oSP5Lik5Liq5LiJ6KeS5b2i55qE55u45Ly85q+U5pivNe+8mjPvvIzpnaLnp6/mr5TlsLHmmK8yNe+8mjnvvIw8YnI+5aSn5bCP6Z2i56ev55u45beuMTbku73vvIzmiYDku6Xmr4/ku73nmoTpnaLnp6/mmK8zMsO3MTY9Mu+8iGNtPHN1cD4yPC9zdXA+77yJ77yM5omA5Lul5bCP5LiJ6KeS5b2i55qE6Z2i56ev5Li6MsOXOT0xOO+8iGNtPHN1cD4yPC9zdXA+77yJ77yOPGJyPuaVhemAiUTvvI4=