Geometry
Fourth grade geometry lesson. Lines, line segments, rays, acute, straight and obtuse angles, and parallel & perpendicular lines.
MORE DECKS TO EXPLORE
PRESENTATION OUTLINE
What do you know about geometry?
CAN YOU DRAW A...
- Polygon
- Triangle
- Quadrilateral
- Shape with symmetry
- Shape without symmetry
Photo by geishaboy500
Line: a straight path through points that continues in both directions
Line segment: a figure that has two endpoints
Ray: part of a line that has one endpoint & continues in the other direction
CAN YOU DRAW A...
- Line
- Line segment
- Ray
- Polygon with symmetry using all three
Parallel Lines: lines that never cross
Perpendicular Lines: lines that form a square corner
Where are the parallel lines?
Where are the perpendicular lines?
Photo by travisroberts
Angle: formed by two rays or line segments with the same endpoint
Right Angle: forms a square corner & a 90 degree angle
Straight Angle: forms a line
Acute Angle: smaller/ less than a right angle
Obtuse Angle: larger/ greater than a right angle but smaller/ less than a straight angle
DRAW A CITY WITH...
- A fountain with vertical symmetry and rays of water coming out
- A candy shop made of line segments with an acute roof angle
- Two streets that are parallel to each other
- A street that is perpendicular to the others
- A slide showing an acute angle
- An ice cream shop made of line segments with an obtuse angle roof
