
20220615_相似な図形の面積比
Authored by Takayuki Yokoi
Mathematics
9th Grade
Used 7+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
①△ABCと△DEFは相似であり、その相似比は2:3である。
△ABC:△DEFを求めなさい。
2:3
4:6
4:9
8:27
その他
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
②次の図において、△ADE:四角形DBCEを求めなさい。
1:3
1:8
1:9
1:16
その他
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
③相似比が5:2の相似な2つの図形F,Gがある。
Fの面積が400㎠のとき、Gの面積を求めなさい。
64㎠
160㎠
1000㎠
2500㎠
その他
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
④△ABCにおいて、辺ABの中点をDとし、点Dを通り辺BCに平行な直線と辺ACとの交点をEとする。
△ABCの面積が24㎠のとき、△ADEの面積を求めなさい。
3㎠
6㎠
12㎠
24㎠
その他
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
⑤2つの円A,Bがあり、Bの円周の長さはAの円周の長さの3倍である。Aの面積が4π㎠のとき、Bの面積を求めなさい。
12π ㎠
36π ㎠
その他
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
⑥△ABCの辺BC上にBD:DC=2:3となる点Dをとる。
また、四角形AEDFが平行四辺形となるように、辺AB上に点E、辺AC上に点Fをとる。
△BDEの面積が20であるとき、平行四辺形AEDFの面積を求めなさい。
7.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
⑦2つの球A,Bについて、表面積比が16:25のとき、体積比を求めなさい。
(半角入力)
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