10 . right angle: a scalene triangle could have sides 6, 8, 10 . obtuse: a scalene triangle could have sides 6, 7, 10 So a scalene triangle could be any of acute, right angle or obtuse. ¹In terms of acute, right angle or obtuse. read more
A right-angled triangle (also called a right triangle) is a triangle with a right angle (90°) in it. read more