A right angle measures exactly 90 degrees.
Resources cannot be aligned to this standard, browse sub-standards to find lessons.
Perpendicular lines intersect at right angles. The symbol ⊥ is used to indicate that two lines are perpendicular.
Use symbolic notation to describe parallel lines and perpendicular lines. (b)
A line segment is part of a line. It has two endpoints and includes all the points between and including the endpoints. To name a line segment, name the endpoints (e.g., 𝐴𝐵‾ read as “line segment 𝐴𝐵”).
The edge is the line segment where two faces of a solid figure intersect.
Identify practical situations that illustrate parallel, intersecting, and perpendicular lines. (b)