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# é¢ç©ã®æ±ãæ¹ãèããã - PowerPoint PPT Presentation

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### 面積の求め方を考えよう

２　平行四辺形の面積

1cm

A

D

1cm

ヒント

B

C

１．次の平行四辺形の面積の求め方を考えましょう。

B

C

D

A

1cm

A

D

B

1cm

８×５÷２＝２０

２０×２＝４０

４０c㎡

1cm

ずらす

1cm

５×８＝４０

４０c㎡

1cm

ずらす

D

A

1cm

B

C

５×８＝４０

４０c㎡

1cm

A

D

1cm

C

B

２×５÷２＝５

５×２＝１０

５×６＝３０

１０＋３０＝４０

４０c㎡

２．平行四辺形の面積の公式を考えましょう。２．平行四辺形の面積の公式を考えましょう。

A

D

ＢＣ＝８㎝

ＡＥ＝５㎝

E

B

８×５＝４０

４０ c㎡