Question

in a quadirateral, three angles are equal and the fourth angle is 40 degree less than each of the equal angles. find the measure of each angle

Answer 1

let the three equal angles be x nd fourth angle be x-40

we know the ,

sum of angles of quad is 360°

so x+x+x+(x-40)=360

4x-40=360

4x=360+40

4x=400

x=100

hence measures of 3 angles of quad is 100° nd fourth angle is (100-40)=60