Perpendicular
diagonal
a flat line.90 degrees is a straight corner, L180 degrees is a straight line, l270 degrees is a straight corner but opposite of 90 degrees, L360 degrees is a straight line that have turned all the way round, l
draw a straight line from one corner to its opposite corner the length of the diagonal is the length of one side times the square root of 2
A straight line that joins one vertex to another vertex.
The word straight does have an antonym, which is crooked. So perhaps a crooked line is the opposite of a straight line.
diagonal
diagonal
A diagonal
A line is a straight path that extends infinitely or endlessly in opposite directions. A straight path that joins two points is called a line segment.
It's a straight line for example within a square that joins opposite corners
a flat line.90 degrees is a straight corner, L180 degrees is a straight line, l270 degrees is a straight corner but opposite of 90 degrees, L360 degrees is a straight line that have turned all the way round, l
Draw an 'x' in the square by drawing a straight line from each corner to the opposite corner.
draw a straight line from one corner to its opposite corner the length of the diagonal is the length of one side times the square root of 2
diameter
A bimedian is a line which joins the midpoints of opposite sides of a quadrilateral or tetrahedron.
Diameter Diameter radius
A straight line that joins one vertex to another vertex.