The sum of angles in a triangle is greater than 180 度,or smaller than 180 度?
Try to find some information from the website to prove it
F1 Maths
2012-11-02 6:01 am
回答 (6)
2012-11-02 9:24 am
✔ 最佳答案
必先清楚一點：三角形、梯形、平行四邊形、長方形、菱形、正方形、圓形...等圖形，都是指平面上的圖形
而三角形內角和必為180度，可這樣證明：
任意選三角形上的一隻角，並加上一穿過這點，而又與這點之對邊平行的線，並利用數學上的"錯角"、"alt. angle"，以及"直線上的鄰角"、"adj. angles on st. line"，便可輕易證明。
希望幫到你~
http://hk.knowledge.yahoo.com/question/question?qid=7012102800417
我在以上地方已證明一次，如有問題可以再問的~~
2012-11-02 01:25:30 補充：
equal to 180degree~~!!
參考: maeducation.edu.hk
2012-11-08 4:58 am
smaller than 180 度
The angle sum of triangle is equal to 180度
There are 3 angles in a triangle
Therefore,they must need to be smaller than180度
The angle sum of triangle is equal to 180度
There are 3 angles in a triangle
Therefore,they must need to be smaller than180度
2012-11-03 10:50 pm
=180度
等邊三角形既三個角一樣
每個角都=60度
60+60+60=60x3
=180
So,the sum of angles in a triangle is equal to 180 度
等邊三角形既三個角一樣
每個角都=60度
60+60+60=60x3
=180
So,the sum of angles in a triangle is equal to 180 度
參考: from Oxford MTH task book 1A/B
2012-11-02 7:11 am
The answer is:
The sum of a triangle is smaller than180 度.The reason of the answer is a triangle could only have 1鈍角,2 銳角 or 3 of them are銳角. If the triangle is greater than 180 度,it will be be the triangle.
The sum of a triangle is smaller than180 度.The reason of the answer is a triangle could only have 1鈍角,2 銳角 or 3 of them are銳角. If the triangle is greater than 180 度,it will be be the triangle.
參考: I am the from of student of band 1
2012-11-02 6:06 am
The angle sum of triangle EQUALS to 180°.
2012-11-02 6:04 am
smaller then 180 degrees
收錄日期: 2021-04-16 15:09:17
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20121101000051KK00595