Facing due east this week at around 6:30 p.m. local time, we can see an almost perfect isosceles triangle formed by the bright stars marking the heads of Gemini the Twins, Pollux and Castor and ...

An equilateral triangle fits into its outline three times in a full 360° turn. Image caption, An isosceles triangle has two sides that are equal in length. Isosceles means equal legs. The ‘legs ...