Question

angle of a guadrilateral are in the ratio 1:2:3:4.find the angles. also give special name of this quadrilateal,if any

Answer 1

Hi,

a trapezium

Explanation:

`\angle{DAB}=36^o\\\angle{ABC}=72^o\\\angle{BCD}=108^o\\\angle{CDA}=144^o\\\angle{ECB}=180^o-108^o=72^o\\\\\\`

There are 2 alterne interne angles of same measure , lines are parallel

AB//DC

The quadrilateral is thus a trapezium.