Section 1.1 Points, Lines, and Planes All geometric … Section 1.1 Points, Lines, and Planes All...
-
Upload
vuongnguyet -
Category
Documents
-
view
218 -
download
1
Transcript of Section 1.1 Points, Lines, and Planes All geometric … Section 1.1 Points, Lines, and Planes All...
![Page 1: Section 1.1 Points, Lines, and Planes All geometric … Section 1.1 Points, Lines, and Planes All geometric shapes are made of points. In Geometry you will learn about those](https://reader035.fdocuments.us/reader035/viewer/2022062907/5aa575917f8b9a1d728d3067/html5/thumbnails/1.jpg)
1
Section 1.1 Points, Lines, and Planes
All geometric shapes are made of points.
In Geometry you will learn about those shapes and their characteristics.
A point is simply a location.
A line is made up of points and has no thickness or width.
Points on the same line are said to be collinear.
A plane is a flat surface made up of points.
Points that lie on the same plane are said to be coplanar.
A B n
XY
ZT
![Page 2: Section 1.1 Points, Lines, and Planes All geometric … Section 1.1 Points, Lines, and Planes All geometric shapes are made of points. In Geometry you will learn about those](https://reader035.fdocuments.us/reader035/viewer/2022062907/5aa575917f8b9a1d728d3067/html5/thumbnails/2.jpg)
2
A plane has no depth and extends infinitely in all directions.
Points are often used to name lines and planes.
The letters of the points can be in any order.
![Page 3: Section 1.1 Points, Lines, and Planes All geometric … Section 1.1 Points, Lines, and Planes All geometric shapes are made of points. In Geometry you will learn about those](https://reader035.fdocuments.us/reader035/viewer/2022062907/5aa575917f8b9a1d728d3067/html5/thumbnails/3.jpg)
3
Ex 1 Use the figure to name each of the following:
a. a line containing point A
b. a plane containing point C
Ex 2 Name the geometric shapes modeled by the picture.
![Page 4: Section 1.1 Points, Lines, and Planes All geometric … Section 1.1 Points, Lines, and Planes All geometric shapes are made of points. In Geometry you will learn about those](https://reader035.fdocuments.us/reader035/viewer/2022062907/5aa575917f8b9a1d728d3067/html5/thumbnails/4.jpg)
4
Ex 3 Name the geometric shape modeled by each object.
a. the long hand on a clock
b. a 10 x 12 patio
c. the location where the corner of a driveway meets the road
In geometry, point, line, and plane are considered undefined terms because they are only explained using examples and descriptions.
![Page 5: Section 1.1 Points, Lines, and Planes All geometric … Section 1.1 Points, Lines, and Planes All geometric shapes are made of points. In Geometry you will learn about those](https://reader035.fdocuments.us/reader035/viewer/2022062907/5aa575917f8b9a1d728d3067/html5/thumbnails/5.jpg)
5
c. plane R contains lines AB and DE, which intersect at point P. Add point C on plane R so that it is not collinear with AB or DE.
d. QR on a coordinate plane contains P(4,4) and Q (2,4). Add point T so that T is collinear with these points.
b. TU lies in plane Q and contains point R.
Ex 4 Draw and label a figure for each relationship.a. Lines GH and JK intersect at L for , , and K(2,3) on a coordinate plane. Point M is coplanar with these points, but not collinear with GH and JK.
![Page 6: Section 1.1 Points, Lines, and Planes All geometric … Section 1.1 Points, Lines, and Planes All geometric shapes are made of points. In Geometry you will learn about those](https://reader035.fdocuments.us/reader035/viewer/2022062907/5aa575917f8b9a1d728d3067/html5/thumbnails/6.jpg)
6
Space is a boundless, threedimensional set of all points.
Space contains lines and planes.
Ex 5
a. How many planes appear in this figure?
b. Name three points that are collinear.
c. Are points G, A, B, and E coplanar? Explain.
d. At what point do EF and AB intersect?
![Page 7: Section 1.1 Points, Lines, and Planes All geometric … Section 1.1 Points, Lines, and Planes All geometric shapes are made of points. In Geometry you will learn about those](https://reader035.fdocuments.us/reader035/viewer/2022062907/5aa575917f8b9a1d728d3067/html5/thumbnails/7.jpg)
7
Modeling Intersecting Planes Activity1. Draw a line where the two planes meet. The intersection of two planes is a line, so let’s label two points on the line, C and D.2. Draw a point F on your model so that it lies in Q but not in R. Can F lie on DC?3. Draw point G so that it lies in R, but not in Q. Can G lie on DC?4. If point H lies in both Q and R, where would it lie? Draw point H on your model.5. Draw a sketch of your model on paper. Label all points, lines, and planes appropriately.
Assign Pgs. 9 11 # 4 10, 12 18, 21 27, 30 35, 37, 41, 43 Pg. 12 Read page and do # 1, 2
![Page 8: Section 1.1 Points, Lines, and Planes All geometric … Section 1.1 Points, Lines, and Planes All geometric shapes are made of points. In Geometry you will learn about those](https://reader035.fdocuments.us/reader035/viewer/2022062907/5aa575917f8b9a1d728d3067/html5/thumbnails/8.jpg)
8
Example 1 Draw 3 planes that do not intersect.
Example 2 Draw plane W. Line BC lies in plane W, line AD intersects plane W at point E.
Example 3 Lines a, b, and c are coplanar, but do not intersect.