Polygons
What is a polygon?
closed shape.
plane shape.
made up of line segments that meet only at their endpoints.
I am a quadrilateral with exactly 1 pair of opposite sides that are parallel. What shape am I?
A trapezoid
An angle shares...
an endpoint.
Describe a line in 3 ways.
is a straight path.
continues in both directions.
does not end.
Name 3 types of lines.
Intersecting lines, perpendicular lines and parallel lines.
What is the name of a polygon with 8 sides called?
Octagon.
A rhombus has ___ pairs of opposite sides that are parallel and ___ sides that are of equal length.
2 pairs of opposite sides that are parallel
4 sides that are of equal length
If an angle measures 97 degrees, it is what type of angle?
Obtuse Angle
A closed shape starts and ends at the SAME point.
An open shape does not start and end at the same point.
Perpendicular Lines.
Square.
Describe an acute angle.
an angle that measures smaller than 90 degrees.
Describe a line segment.
is straight.
is part of a line.
has 2 endpoints.
Draw a shape that has parallel lines.
Example: hexagon, octagon, decagon, quadrilaterals
How many angles does a hexagon have?
6 angles. 6 sides.
Think of an oval, it is a closed plane shape. But why is it NOT a polygon?
There are no line segments that meet only at their endpoints.
Think of a rhombus, what types of angles is it made of?
2 angles that are less than a right angle (acute)
2 angles that are greater than a right angle (obtuse)
BOTH
Think about a rectangle, what lines is it made up of?
Parallel and perpendicular lines
Name and draw 3 polygons.
Examples: triangle, quadrilateral, pentagon, hexagon, octagon, decagon...
Explain how a trapezoid and a rectangle are different.
A rectangle has 2 pairs of parallel sides, whereas a trapezoid has at least 1 pair of parallel sides.
How do you know an angle is greater than or less than a right angle?
Answers may vary.
Draw a shape with two endpoints.
IMPOSSIBLE.
Find 2 examples of perpendicular lines inside your classrom.
window frame, door frame, a book, desk, table