The shape comes from the Late Etruscan R. the etra leg was probably added to distinguish R from P.
Rhombus
rhomboid round
rectangleright triangleround
Triangle !
Two shapes beginning with r are rectangle and rhombus.
· rectangle · right triangle
I murdering you
The answer will depend on what the shape is and which aspect of the shape is measured by r.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --RR-R--R. That is, nine letter words with 3rd letter R and 4th letter R and 6th letter R and 9th letter R. In alphabetical order, they are: forrarder
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern R---R-R--. That is, nine letter words with 1st letter R and 5th letter R and 7th letter R. In alphabetical order, they are: riroriros
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -R--R-R-. That is, eight letter words with 2nd letter R and 5th letter R and 7th letter R. In alphabetical order, they are: armorers orderers
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern R--O-R-R. That is, eight letter words with 1st letter R and 4th letter O and 6th letter R and 8th letter R. In alphabetical order, they are: rumourer