by miss o.. the branch of mathematics concerned with the properties of and relationships between...
TRANSCRIPT
Geometry By Miss O.
The branch of mathematics concerned with the properties of and relationships between points, lines, planes, and figures.
Geometry (jee-om-i-tree) – n.
The earliest records of geometry can be traced to ancient Egypt and the Indus Valley from around 3000 BC.
Geometry is ancient.
Euclid, a Greek mathematician, wrote The Elements of Geometry.
He presented geometry in a practical form known as Euclidean geometry Euclid’s was not the first important early texts on geometry.
Euclid
An exact location in space; named by a capital letter
Point
A straight path that extends forever in opposite directions; named by two points on the line
RS
Line
R
S
A part of a line with two endpoints; named by the two endpoints
PZ
Line segment
ZP Q
A flat surface that extends without end in all directions
Plane
A part of a line with one endpoint that extends forever in one direction; named by the endpoint first followed by another point on the ray
Ray
Twp rays joined at a common endpoint called the vertex; named by the vertex or the vertex and a point on each ray
Angle
The point on an angle or polygon where two lines or rays meet; named with a capital letter
Vertex
Vertex
90 degrees Square corner Little box
Right angle
Less than 90 degrees
Acute Angle
More than 90 degrees
Obtuse Angle
180 degrees Straight line
Straight Angle
http://www.youtube.com/watch?v=yptZt9hwrzU&safety_mode=true&persist_safety_mode=1&safe=active
Build all 4 angles with your bodies on the carpet. Each group will have 4 students in it.
Miss O. will come around to take a photo of each angle for the website!
Activity 1
Play “Simon Says” with each hand motion that represents a geometric term we learned today!
Activity 2
Lines that pass through the same point
Intersecting Lines
Lines that never intersect
Parallel Lines
Lines that form right angles (90 degree angles)
All perpendicular lines are also intersecting lines!
Perpendicular Lines
What geometric term is represented?
What geometric term is represented?
What geometric term is represented?
What geometric term is represented?
What geometric term is represented?
What geometric term is represented?
What geometric term is represented?
What geometric term is represented?
What geometric term is represented?
What geometric term is represented?
What geometric term is represented?
In the world around you, where do you see geometric figures in real life every day?
Make a list with your partner of at least 3 ways!
Talk and Turn:
Find all the angles