 Hello and welcome to the session. In this session we will discuss constructing a quadrilateral. Let's learn how to construct a quadrilateral when two adjacent sides, three angles are known. Let's try and construct the quadrilateral PQRS where we have PQ equal to 5 centimeters, QR equal to 4 centimeters, angle P equal to 60 degrees, angle Q equal to 70 degrees and angle R equal to 100 degrees. First let's draw a rough sketch for this quadrilateral PQRS. This is the rough sketch of the quadrilateral PQRS where we have PQ is 5 centimeters, QR is 4 centimeters, angle P is 60 degrees, angle Q is 70 degrees and angle R is 100 degrees. Now let's construct the quadrilateral PQRS step by step. Let's first make the choice of the base using this rough sketch. So after we visualize this rough sketch we find that a first step would be draw PQ equal to 5 centimeters and at Q make an angle of 70 degrees. So as you can see we have drawn PQ equal to 5 centimeters and this angle is 70 degrees, that is angle PQX is equal to 70 degrees. Now in the rough sketch as you can see that QR is equal to 4 centimeters. So in the next step we mark a point R on the ray QX such that we have QR is equal to 4 centimeters. So this is the point R where QR is 4 centimeters then you have angle R equal to 100 degrees. So in the next step we make an angle of 100 degrees at the point R. So this is the angle of measure 100 degrees that is angle QRY is equal to 100 degrees. Then we have angle P is of measure 60 degrees. So our next step would be make an angle of 60 degrees at the point P. So this angle is of measure 60 degrees that is we have angle QPZ is equal to 60 degrees. Now let the point of intersection of the rays PZ and RYB marked as S. So we have the PQRS is the required quadrilateral. Thus we have PQRS is the required quadrilateral with PQ is equal to 5 centimeters, QR is equal to 4 centimeters, angle P equal to 60 degrees, angle Q equal to 70 degrees and angle R equal to 100 degrees. So this completes the session. Hope you have understood how we construct a quadrilateral when two adjacent sides and three angles are known.