[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

Search:

View post   
>> No.8402248 [View]
File: 6 KB, 1124x219, trianglesum.png [View same] [iqdb] [saucenao] [google]
8402248

DCA, ACB, BCE form a straight angle.
DCA+ACB+BCE=180
Since CD is parallel to AB the alternate interior angles created by AC are equal
DCA=BAC
likewise the alternate interior angles created by CB are equal
BCE=ABC
substituting the above two equations into the first we get
ABC+ACB+BAC=180

Navigation
View posts[+24][+48][+96]