Contact us
Choose a category below so we can get back to you as quickly as possible.
設這個角為x他的補角為180-x餘角為90-x差為180*1/5,則可列式:180-x-2(90-x)=180*1/5,x=36
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.