Triangles in Square
Many triangles
3x3 grid —- sum of angles a to i
https://www.instagram.com/p/DD0-XExxb6c/?igsh=dXlpejM4NnphaDg3
5 triangles at the tips of 5-point star
https://www.instagram.com/p/DDR-4BcTn2O/?img_index=1&igsh=c3Fybm8zZnIwZTE5
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Find angle even with no numbers given!
involving circle & square
https://www.instagram.com/p/DFNjpBJTmpt/?igsh=NzN3aG01d3B6amVn
Triangles within square
https://www.instagram.com/p/DFNi671zFAu/?igsh=dGpxMmdkYnYyYWNu
