Mathematics for IGCSE & O level - Ratio And Proportion (Section 1 - No. 2)
The angles of a quadrilateral are in the ratio 1:2:3:4. What is the size of the largest angle?
36 degrees
72 degrees
108 degrees
144 degrees
Giải thích
Total degrees 360, total ratio 10. So largest is 4/10*360=144