- Right triangle (Wikipedia)
A right triangle or right-angled triangle, sometimes called an orthogonal triangle or rectangular triangle, is a triangle in which two sides are perpendicular forming a right angle (1⁄4 turn or 90 degrees).
- Kurt Cobain (Wikipedia)
Kurt Donald Cobain (February 20, 1967 – c. April 5, 1994) was an American musician. He was the lead vocalist, guitarist, primary songwriter, and a founding member of the grunge band Nirvana. Through his angsty songwriting and anti-establishment persona, his compositions widened the thematic conventions of mainstream rock music. He was heralded as a spokesman of Generation X and is widely recognized as one of the most influential alternative rock musicians.