Question

Answer the 3rd questions ​

Answer 1

Answer:

let the angles of quadrilateral be x

the sum of all the measures of a quadrilateral is 360°

∴ x+x+x+x=360°

∴4x=360°

∴x= 360°/4

∴x=90°

∴ measure of each angle of a QUADRILATERAL is 90°