“…In addition, the application of the Local Instruction Trajectory in a Burongko cake can shape students' character, such as self-confidence, sympathy, empathy, respect for others, awareness of social problems and a social spirit, and responsibility. These results support several previous research results that state that learning activities related to daily activities, namely ethnomathematics, can be a starting point in learning mathematics (Risdiyanti et al, 2019;Risdiyanti & Indra Prahmana, 2020;Prahmana, 2015;Fitri & Prahmana, 2020;Prihastari, 2015;Supiyati et al, 2019;Pujawan et al, 2020;Aras & Zahrawati, 2021) Students' critical thinking in solving quadrilaterals problems after the learning process using the ethnomathematical context showed no significant difference in the geometric problem-solving process between students with high mathematical and low mathematical abilities. It is shown based on the results of the problem-solving ability test where students who have the high mathematical ability get a score of 90 and students with the low mathematical ability get a score of 79, and based on the results of interviews, students with high mathematical ability and low mathematical ability are both able to make an interpretation, analysis, evaluation, and good decision.…”