The Philippines' National Book Development Board (Filipino: Pambansang Lupon sa Pagpapaunlad ng Aklat), abbreviated as NBDB, is an agency of the Philippine government under the Department of Education responsible for developing and supporting the Philippine book publishing industry.
Properties of Quadrilaterals
This module is about the properties of trapezoids and parallelograms. In this module, you will learn to compute problems involving the median of a trapezoid, the base angles and diagonals of an isosceles trapezoid, as well as
problems involving the diagonals, angles and sides of parallelograms
TO VIEW THE COMPLETE MODULE, PLEASE CLICK ON THE LINKS BELOW:
* PDF File of Properties of Quadrilaterals module
* Project EASE Self-Learning Module in Mathematics


Solita Collas-Monsod
The Bureau of Secondary Education (BSE) aims to provide access and quality secondary
education to the Filipino youth. It is responsible for establishing secondary schools where there are none; formulating policies, plans and projects, and maintaining a complete and integrated system of secondary education with regards to curriculum, facilities and teachers' in-service training relevant to the goals of national development.