Sarmiento, Felipe M. Plane geometry with basic trigonometry : a simplified approach / Felipe M. Sarmiento and Wilfredo N. de Castro. - Manila : Unlimited Books , c2016. - 285p. ; 24cm. Includes references. Ch. 1. Basic Trigonometric functions of acute angles -- Ch. 2. Lines, Planes, and Angles -- Ch. 3. Triangles -- Ch. 4. Quadrilaterals -- Ch. 5. Polygons -- Ch. 6. Circles. ISBN: 978-971-9654-16-2 Subjects--Topical Terms: --Geometry Dewey Class. No.: FIL 516.22 S246 2016