This large, nearly equilateral triangle is composed of three of the brightest stars in the sky, each belonging to its own constellation. The brightest is the bluish-white star Sirius (magnitude -1 ...

First, here's an isosceles triangle, it has two equal length sides and two equal angles. ... Three sides of equal length andall the angles are 60 degrees. This is a scalene triangle.

For the next few weeks, the planet Mars will form an almost perfect isosceles triangle with the two bright stars marking the heads of the Gemini Twins, Pollux and Castor.