4th grade geometry

Define a right angle

• An angle that is 91 degrees.

• An angle that is exactly 60 degrees.

• Bigger than 90 degrees.

• Exactly 90 degrees.

Define an obtuse angle

• Bigger than 60 degrees, less than 90 degrees.

• Bigger than 90 degrees, less than 180 degrees.

• Smaller than 60 degrees, but bigger than 10 degrees.

• Smaller than 90 degrees, but bigger than 60 degrees.

Define an acute angle.

• Smaller than 100 degrees.

• Exactly 90 degrees.

• Less than 90 degrees.

• Greater than 90 degrees.

Define parallel lines

• Lines that can go on forever and they will intersect.

• Lines that will go on forever and will never intersect.

• Lines that will intersect.

• Lines that make a 90 degree angle when they intersect.

Define perpendicular lines.

• Lines that intersect and do not form a 90 degree angle.

• Lines that do not intersect.

• Lines that intersect and make a 90 degree angle.

• Part of a line.

Define intersecting lines.

• Lines that will touch at some point.

• Lines that will not ever touch.

• Two lines that meet and make a 90 degree angle.

• A part of a line with one end point.

Define a point.

• Marks an exact location.

• Part of a line with one endpoint. One end extends forever.

• A straight path that goes on forever in both directions.

• Has two end points, and it is part of a line.

Define a ray.

• Part of a line with one end point, and one end extends forever.

• Part of a line.

• Part of a line, and no ends extend forever.

• An exact location.

Define a line.

• Part of a line.

• A straight path that goes forever in both directions.

• an exact location

• Part of a line with one end point.

Define a line segment.

• Shown by a dot, an exact location.

• Part of a line, it has two end points that extend forever in both directions.

• Part of a line, it has two end points that do not extend forever.

• Part of a line in which one end point extends forever.