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A semicircle and a quarter circle. The length of the side is 2 which is inside the semicircle. What is the area of the red triangle?

The blue vertex is fixed in the plane. The green vertex can be anywhere on a circle. The yellow vertex completes an equilateral triangle. What is the locus of the yellow vertex? mirangu.com/locus-pocus/

Mathematics. Puzzles from India. There exist people on this planet with sufficiently big brains to solve this wild problem, given the limited information provided. Three squares. Angle theta = ? By Suresh G, Suresh G. Used with permission.

Four books on a shelf

Moving Parts? Four squares in a configuration. Angle theta = ? #square #triangle #geometry #geometrique #angle #puzzle #competition #thinking #logic #reasoning #today #riddle #test #mathteachers #math #teacher #mathematics #mathisfun #Algebra #highschool #students #learning

Suresh G 22,5°

Three rectangles of which the blue and the pink one are similar. Prove that the yellow rectangle is also similar. mirangu.com/rectangle-offs… Isnpired by Chris Wildhagen

Honoured to share that the latest edition of "Mathematical Angles" has three of my puzzles. Am sharing the X-links containing the original puzzles. The Mathematical Association Akanksha ルイ 1. x.com/gs_bangalore/s… 2. x.com/gs_bangalore/s… 3. x.com/gs_bangalore/s…

In Equal Measure Square and perpendiculars in constraint. ? = ? #square #triangle #geometry #geometrique #phi #puzzle #competition #thinking #logic #reasoning #today #riddle #test #mathteachers #math #teacher #mathematics #mathisfun #Algebra #highschool #students #learning

Mathematics. Puzzles from Bengaluru, India. Three squares, one having extended sides. Theta = ? Can we actually solve this problem, given the limited information provided? By Suresh G, Suresh G, Used with permission.