Ndahawali, Heinrich, Sri Hariyani, and Nur Farida. “Analysis of Students’ Critical Thinking Skills in Solving Mathematics Problems on Pythagoras”. Journal of Education and Learning Mathematics Research (JELMaR) 1, no. 2 (November 27, 2020): 1-7. Accessed January 23, 2022. http://jelmar.wisnuwardhana.ac.id/index.php/jelmar/article/view/19.