Lines, Points, Rays
An exact location in space.
What is a point?
A polygon is...
a closed plane figure with sides made up of line segments.
A right triangle has __________ right angles.
1
A polygon with all sides with equal length and all angles with equal measures is a __________.
A regular polygon.
Parallel lines will...
Draw a pair of parallel lines.
never intersect each other.
(show on team's whiteboard)
A part of a line, with one endpoint, that is straight and continues in one direction.
What is a ray?
What is a quadrilateral?
A polygon with 4 sides and 4 angles.
An acute triangle has _______ acute angles.
3
In a regular polygon the number of sides equals the number of _________________.
Lines of symmetry
Perpendicular lines form ____________________.
Draw a set of perpendicular lines.
4 right angles
(show on team's whiteboard)
A straight path of points that continues without end in both directions
Name two quadrilaterals with 4 right angles.
An obtuse triangle has __________ acute angle and ________ obtuse angle.
2, 1
A line that goes through vertices that are not next to each other
What is a diagonal line?
Lines in a plane that cross at exactly one point and form two pairs of equal angles.
Draw a pair of this type of lines.
Intersecting lines
(show on team's whiteboard)
A part of a line between two points
What is a line segment?
True or false: A parallelogram can also be called a rhombus.
Why?
False.
A rhombus MUST have 4 equal sides.
False. The other angle HAVE to be acute.
A fold line that divides a shape into two parts that are the same size and shape
What is a line of symmetry?
Draw a pair of each type of lines. (Parallel, perpendicular, and intersecting)
Polygons are made up of these.
What is a line segment?
A trapezoid can also be called a...(name all)
Quadrilateral
True or false: All triangles have 3 lines of symmetry. Explain your answer.
False. Only regular triangles (equal sides and angles) have three lines of symmetry.
Draw a shape with 4 lines of symmetry.
(show on your team's whiteboard)
Name all the quadrilaterals with exactly one pair of parallel lines.
Trapezoid