3. The angle between two altitudes of a parallelogram through the vertex of an obtuse angle of the parallelogram is 60^o. Find the angles of the parallelogram. 3. The angle between two altitudes of a parallelogram through the vertex of an obtuse angle of the parallelogram is 60^o. Find the angles of the parallelogram. July 1, 2021 Category: Chapter 8 - Quadrilaterals , Maths , NCERT Class 9 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related