∠A = arccos(4/5) = arcsin(3/5) = 36.86989764…° ∠B = 90° - ∠A = 53.13010235…° according to wolfram alpha. it’s obvious that these numbers are irrational by Niven’s theorem and transcendental by the Lindemann–Weierstrass theorem.
posted at 08:03:26
the area is 4*3/2 = 6. ppl seem confused by the hypotenuse drawn on the bottom. such integer sided right triangles are called pythagorean triangles. since CH : CA = BC : BA or CH : 4 = 3 : 5, CH = 12/5. BH is found by the pythagorean theorem and so is HA. pic.twitter.com/pPOKtDaSc9
posted at 07:42:14
A quiz to find the area of the triangle, which only 55.4% of 6th graders in japan got right. i did some research on this. president.jp/articles/-/54306 pic.twitter.com/1q2YobppxZ
posted at 06:31:30