本课配套习题挑战模式1/5
单选题
难度系数:
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 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u55u45Ly85LiJ6KeS5b2i55qE6Z2i56ev55qE5q+U562J5LqO55u45Ly85q+U55qE5bmz5pa56L+b6KGM6K6h566X77yO
- 答案:Qg==
6Kej77ya5qC55o2u6aKY5oSP5b6XPGltZyB3aWR0aD04NCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zNy9GRi9yQkFDRkZXYmxYV1JPeV9NQUFBREMyQnVONmM1NjUucG5nIj48YnI+5omA5LulUzxzdWI+4pazPC9zdWI+PHN1Yj5ERUY8L3N1Yj49NMOXMj0477yOPGJyPuaVhemAiULvvI4=
本课配套习题挑战模式2/5
单选题
难度系数:
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 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u55u45Ly85LiJ6KeS5b2i6Z2i56ev55qE5q+U562J5LqO55u45Ly85q+U55qE5bmz5pa55YiX5Ye65q+U5L6L5byP77yM5Luj5YWl5pWw5YC86K6h566X5Y2z5Y+v5b6X6Kej77yO
- 答案:QQ==
6Kej77ya4oi14pazQUJD4oi94pazREVG77yM4pazQUJD5LiO4pazREVG55qE6Z2i56ev5LmL5q+U5Li6Me+8mjLvvIw8YnI+4oi077yIQkPvvJpFRu+8iTxzdXA+Mjwvc3VwPj0x77yaMu+8jDxicj7op6PlvpdCQ++8mkVGPTHvvJo8aW1nIHdpZHRoPTE5IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzkxL0FGL3JCQUNKbFdibFhtUV9URDJBQUFCZTMxX1dlRTY5My5wbmciPu+8jDxicj7iiLVCQz0x77yMPGJyPuKItEVGPTxpbWcgd2lkdGg9MTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTEvQUYvckJBQ0psV2JsWG1RX1REMkFBQUJlMzFfV2VFNjkzLnBuZyI+PGJyPuaVhemAiUHvvI4=
本课配套习题挑战模式3/5
单选题
难度系数:
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 |
一次做对,真牛!
+5奖励规则>
- 提示1:6K6+5Y+m5LiA5Liq5LiJ6KeS5b2i5pyA55+t55qE5LiA6L655piveO+8jOagueaNruebuOS8vOS4ieinkuW9ouWvueW6lOi+ueaIkOavlOS+i+WNs+WPr+W+l+WHuue7k+iuuu+8jg==
- 答案:Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数:
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 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u55u45Ly85LiJ6KeS5b2i55qE5a+55bqU57q/5q6177yI5a+55bqU5Lit57q/44CB5a+55bqU6KeS5bmz5YiG57q/44CB5a+55bqU6L655LiK55qE6auY77yJ55qE5q+U562J5LqO55u45Ly85q+U5b6X5Yiw5Lik5Liq55u45Ly85LiJ6KeS5b2i55qE5ZGo6ZW/55qE5q+U5Li6Mu+8mjPvvIzorr7ov5nkuKTkuKrkuInop5LlvaLnmoTlkajplb/liIbliKvkuLoyeO+8jDN477yM5YiZMngrM3g9MjDvvIznhLblkI7op6PmlrnnqIvmsYLlh7p45ZCO6K6h566XMnjlkowzeOWNs+WPr++8jg==
- 答案:QQ==
6Kej77ya4oi15Lik5Liq55u45Ly85LiJ6KeS5b2i5a+55bqU5Lit57q/55qE5q+UMu+8mjPvvIw8YnI+4oi05Lik5Liq55u45Ly85LiJ6KeS5b2i55qE5ZGo6ZW/55qE5q+U5Li6Mu+8mjPvvIw8YnI+6K6+6L+Z5Lik5Liq5LiJ6KeS5b2i55qE5ZGo6ZW/5YiG5Yir5Li6MnjvvIwzeO+8jDxicj7liJkyeCszeD0yMO+8jOino+W+l3g9NO+8jDxicj7iiLQyeD0477yMM3g9MTLvvIw8YnI+5Y2z5Lik5Liq5LiJ6KeS5b2i55qE5ZGo6ZW/5YiG5YirOOWSjDEy77yOPGJyPuaVhemAiUHvvI4=
本课配套习题挑战模式5/5
单选题
难度系数:
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 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u55u45Ly85LiJ6KeS5b2i6Z2i56ev55qE5q+U562J5LqO55u45Ly85q+U55qE5bmz5pa577yM5Y+v5rGC5bCP5LiJ6KeS5b2i55qE6Z2i56ev5Li6MThjbTxzdXA+Mjwvc3VwPu+8jg==
- 答案:RA==
6Kej77ya5qC55o2u6aKY5oSP5Lik5Liq5LiJ6KeS5b2i55qE55u45Ly85q+U5pivNe+8mjPvvIzpnaLnp6/mr5TlsLHmmK8yNe+8mjnvvIw8YnI+5aSn5bCP6Z2i56ev55u45beuMTbku73vvIzmiYDku6Xmr4/ku73nmoTpnaLnp6/mmK8zMsO3MTY9Mu+8iGNtPHN1cD4yPC9zdXA+77yJ77yM5omA5Lul5bCP5LiJ6KeS5b2i55qE6Z2i56ev5Li6MsOXOT0xOO+8iGNtPHN1cD4yPC9zdXA+77yJ77yOPGJyPuaVhemAiUTvvI4=