Arjawa, A.G.P., Sariyasa, .-. and Suweken, G. 2018. Developing instructional multimedia for teaching line and angle to the seventh grade students of junior high school. International journal of engineering and computer science. 1, 1 (May 2018), 6-13. DOI:https://doi.org/10.31295/ijecs.v1n1.18.