Question

The measure of three angles of a quadrilateral are 100° ,70°,80° then the fourth angles is

Answer 1

all angles have a sum..... 360

so,108+75+105+x=360

x=80

Answer 2

$\huge\boxed{\underline{\underline{\purple{\tt Solution}}}}$

A regular polygon whose each of its exterior angle measures

${24}^{\circ}$

So the required number of sides

$= \frac{360}{24} = 15$