A lines-and-angles?dictionary=line&did=227" onclick="getAsistant(this,event,227,'line');return false;" style="color:#009000;">line is a straight path that extends infinitely in both directions. There are different types of lines-and-angles?dictionary=lines&did=227" onclick="getAsistant(this,event,227,'line');return false;" style="color:#009000;">lines:
Straight Line: A lines-and-angles?dictionary=line&did=227" onclick="getAsistant(this,event,227,'line');return false;" style="color:#009000;">line that does not curve or bend.
lines-and-angles?dictionary=ray&did=228" onclick="getAsistant(this,event,228,'ray');return false;" style="color:#009000;">Ray: A lines-and-angles?dictionary=line&did=227" onclick="getAsistant(this,event,227,'line');return false;" style="color:#009000;">line that has one lines-and-angles?dictionary=endpoint&did=285" onclick="getAsistant(this,event,285,'endpoint');return false;" style="color:#009000;">endpoint and extends infinitely in one direction.
lines-and-angles?dictionary=line+segment&did=226" onclick="getAsistant(this,event,226,'line segment');return false;" style="color:#009000;">Line Segment: A part of a lines-and-angles?dictionary=line&did=227" onclick="getAsistant(this,event,227,'line');return false;" style="color:#009000;">line that has two lines-and-angles?dictionary=endpoints&did=285" onclick="getAsistant(this,event,285,'endpoint');return false;" style="color:#009000;">endpoints.
An lines-and-angles?dictionary=angle&did=229" onclick="getAsistant(this,event,229,'angle');return false;" style="color:#009000;">angle is formed when two lines-and-angles?dictionary=rays&did=228" onclick="getAsistant(this,event,228,'ray');return false;" style="color:#009000;">rays share a common lines-and-angles?dictionary=endpoint&did=285" onclick="getAsistant(this,event,285,'endpoint');return false;" style="color:#009000;">endpoint. The common lines-and-angles?dictionary=endpoint&did=285" onclick="getAsistant(this,event,285,'endpoint');return false;" style="color:#009000;">endpoint is called the vertex of the lines-and-angles?dictionary=angle&did=229" onclick="getAsistant(this,event,229,'angle');return false;" style="color:#009000;">angle. lines-and-angles?dictionary=angles&did=54" onclick="getAsistant(this,event,54,'angles');return false;" style="color:#009000;">Angles are measured in degrees.
Right Angle: An lines-and-angles?dictionary=angle&did=229" onclick="getAsistant(this,event,229,'angle');return false;" style="color:#009000;">angle that lines-and-angles?dictionary=measures&did=240" onclick="getAsistant(this,event,240,'measures');return false;" style="color:#009000;">measures 90 degrees.
Straight Angle: An lines-and-angles?dictionary=angle&did=229" onclick="getAsistant(this,event,229,'angle');return false;" style="color:#009000;">angle that lines-and-angles?dictionary=measures&did=240" onclick="getAsistant(this,event,240,'measures');return false;" style="color:#009000;">measures 180 degrees.
Acute Angle: An lines-and-angles?dictionary=angle&did=229" onclick="getAsistant(this,event,229,'angle');return false;" style="color:#009000;">angle that lines-and-angles?dictionary=measures&did=240" onclick="getAsistant(this,event,240,'measures');return false;" style="color:#009000;">measureslines-and-angles?dictionary=less+than&did=20" onclick="getAsistant(this,event,20,'less than');return false;" style="color:#009000;">less than 90 degrees.
Obtuse Angle: An lines-and-angles?dictionary=angle&did=229" onclick="getAsistant(this,event,229,'angle');return false;" style="color:#009000;">angle that lines-and-angles?dictionary=measures&did=240" onclick="getAsistant(this,event,240,'measures');return false;" style="color:#009000;">measures more than 90 degrees but lines-and-angles?dictionary=less+than&did=20" onclick="getAsistant(this,event,20,'less than');return false;" style="color:#009000;">less than 180 degrees.
Types of lines-and-angles?dictionary=angles&did=54" onclick="getAsistant(this,event,54,'angles');return false;" style="color:#009000;">Angles
There are various types of lines-and-angles?dictionary=angles&did=54" onclick="getAsistant(this,event,54,'angles');return false;" style="color:#009000;">angles based on their lines-and-angles?dictionary=measurements&did=274" onclick="getAsistant(this,event,274,'measurement');return false;" style="color:#009000;">measurements and relationships:
Adjacent Angles: Two lines-and-angles?dictionary=angles&did=54" onclick="getAsistant(this,event,54,'angles');return false;" style="color:#009000;">angles that share a common vertex and a common side, but do not overlap.
Complementary Angles: Two lines-and-angles?dictionary=angles&did=54" onclick="getAsistant(this,event,54,'angles');return false;" style="color:#009000;">angles whose lines-and-angles?dictionary=measures&did=240" onclick="getAsistant(this,event,240,'measures');return false;" style="color:#009000;">measures add up to 90 degrees.
Supplementary Angles: Two lines-and-angles?dictionary=angles&did=54" onclick="getAsistant(this,event,54,'angles');return false;" style="color:#009000;">angles whose lines-and-angles?dictionary=measures&did=240" onclick="getAsistant(this,event,240,'measures');return false;" style="color:#009000;">measures add up to 180 degrees.
Vertical Angles: Two non-adjacent angles formed by the intersection of two lines-and-angles?dictionary=lines&did=227" onclick="getAsistant(this,event,227,'line');return false;" style="color:#009000;">lines. They are always congruent (have the same lines-and-angles?dictionary=measure&did=299" onclick="getAsistant(this,event,299,'measure');return false;" style="color:#009000;">measure).
Study Guide
To study lines-and-angles?dictionary=lines&did=227" onclick="getAsistant(this,event,227,'line');return false;" style="color:#009000;">lines and lines-and-angles?dictionary=angles&did=54" onclick="getAsistant(this,event,54,'angles');return false;" style="color:#009000;">angles, make sure to understand the following key concepts:
Identify different types of lines-and-angles?dictionary=lines&did=227" onclick="getAsistant(this,event,227,'line');return false;" style="color:#009000;">lines and their characteristics (straight line, lines-and-angles?dictionary=ray&did=228" onclick="getAsistant(this,event,228,'ray');return false;" style="color:#009000;">ray, lines-and-angles?dictionary=line+segment&did=226" onclick="getAsistant(this,event,226,'line segment');return false;" style="color:#009000;">line segment).
Understand the properties of lines-and-angles?dictionary=angles&did=54" onclick="getAsistant(this,event,54,'angles');return false;" style="color:#009000;">angles and how they are measured in degrees.
Recognize the different types of lines-and-angles?dictionary=angles&did=54" onclick="getAsistant(this,event,54,'angles');return false;" style="color:#009000;">angles (right, straight, acute, obtuse) and their properties.
Learn about lines-and-angles?dictionary=angle&did=229" onclick="getAsistant(this,event,229,'angle');return false;" style="color:#009000;">angle relationships such as adjacent, complementary, supplementary, and vertical angles.
Practice drawing and identifying various types of lines-and-angles?dictionary=angles&did=54" onclick="getAsistant(this,event,54,'angles');return false;" style="color:#009000;">angles and lines-and-angles?dictionary=lines&did=227" onclick="getAsistant(this,event,227,'line');return false;" style="color:#009000;">lines in geometric figures.
[Lines And Angles] Related Worksheets and Study Guides:
Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships.
Identify, compare, and analyze attributes of two- and three-dimensional shapes and develop vocabulary to describe the attributes.
Connections to the Grade 4 Focal Points (NCTM)
Measurement: As part of understanding two-dimensional shapes, students measure and classify angles.