 Hello and welcome to the session. In this session we will discuss one area theorem. According to this theorem we have with equal areas and altitudes. We are given two triangles and so we have that the area of triangle is equal to the area of the triangle PQS perpendicular to PQ. Now since we have these two triangles that is triangle PQR and triangle PQS are on the same base PQ and they have equal areas. So according to this theorem we have to show that they have equal altitudes. That is we need to prove is equal to Sn of the triangle PQR is equal to the area of the triangle PQS. Now this theorem is equal to half into base into height is given as half into base which is PQ is equal to same base have equal altitudes. So this completes the session. Hope you have understood the proof of the given area theorem.