A @Chu Anh cho e xin hình vẽ về bài này được không ạ ?

Proud of VN @Proud of VN

May 2021 1 25 Report

A @Chu Anh cho e xin hình vẽ về bài này được không ạ ?

https://vn.answers.yahoo.com/question/index?qid=20...

Update:

Hình như nó đâu phải lăng trụ đứng đâu ạ. A chứng minh giúp e chỗ này !

Khoa học Tự nhiên / Toán học

Answers & Comments

Chu Anh

CE=DF=AB và CE//DF//AB ---> AD//BF; ED//CF, mà AB vuông góc với AD --> AB vuông góc với BF; lại có AB vuông góc với BC theo giả thiết, vậy cạnh bên AB vuông góc với đáy BCF ---> BCFAED là lăng trụ đứng

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