PSLE Practice Question - Triangular Pattern 1

Question : https://www.geogebra.org/m/qvkbkznm#material/xfgwxeew Past PSLE Question : https://youtu.be/O_EiJW9YAzs GeoGebra Book : https://www.geogebra.org/m/qvkbkznm GeoGebra Site : https://www.geogebra.org/u/namesoatta44