TY - BOOK AU - Natan, Erickalyn P. AU - Cabe, Daphnie Kaye O., jt.a. AU - Torres, Rochelle G., jt.a. TI - Development and validation of worktext in solving problems involving triangle similarity for Grade 9 featuring the architectural infrastructure in Nueva Vizcaya KW - Problem solving KW - Triangle similarity N1 - Undergraduate Thesis (BSED - Mathematics) - Nueva Vizcaya State University; Includes appendices & bibliography ER -