Western Normal University Edition First Grade Mathematics Volume 1
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People's Education Press First Grade Mathematics Volume 1
People's Education Press Second Grade Mathematics Volume 1
People's Education Press Third Grade Mathematics Volume 1
Beijing Normal University Edition Seventh Grade Mathematics Volume 2
Hebei Education Edition Third Grade Mathematics Volume 1
Beijing Normal University Edition Eighth Grade Mathematics Volume 1
Qingdao Edition Seventh Grade Mathematics Volume 1
Beijing Normal University Edition Fifth Grade Mathematics Volume 1
Hebei Education Edition Seventh Grade Mathematics Volume 2
People's Education High School Mathematics Edition B Compulsory Course 2
Beijing Normal University Edition Fifth Grade Mathematics Volume 2
Hebei Education Edition Fourth Grade Mathematics Volume 2
People's Education Press First Grade Mathematics Volume 2
Qingdao Edition Seventh Grade Mathematics Volume 2
Category | Format | Size |
---|---|---|
Beijing Normal University Ninth Grade First Volume Mathematics | pptx | 6 MB |
Description
Similar PPT courseware for the graphic "Parallel lines are proportional to their segments"
think:
1. What we explored above is a special situation on graph paper. Would the above conclusion still be valid if it were not on graph paper?
2. Draw any three parallel lines on the plane and use them to cut two straight lines. Are the cut line segments proportional?
inference:
A straight line parallel to one side of a triangle intersects the other two sides and cuts the other two sides (or the extension lines of both sides), and the resulting corresponding line segments are proportional.
Practice questions
It is known that, as shown in the figure, in △OCE, BD∥CE, AD∥BE.
Prove: OB is the middle term in the ratio of OA and OC.
Tip: In △OCE, ∵BD∥CE.
In △OBE, ∵AD∥BE.
That is, OB2=OA·OC.
∴OB is the middle term in the ratio of OA and OC.
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For more information about the PPT courseware "Similarities of Proportional Figures of Parallel Lines Divided into Line Segments", please click the Similar ppt tag of Proportional Figures of Parallel Lines Divided into Line Segments.
"Parallel lines are proportional to their segments" PPT courseware:
"Parallel lines are proportional to their segments" PPT courseware 1. When two straight lines are intercepted by a set of parallel lines, the corresponding line segments intercepted are _________. 2. If a straight line parallel to one side of a triangle cuts the other two sides (or the extension lines of both sides), the corresponding line segment obtained is _________. 3. parallel..
Similar PPT courseware 4 of the graphic "Parallel lines are proportional to their segments":
"Parallel lines are proportional to their segments" Similar PPT courseware of graphics 4 Review the past and learn new things (1) How to calculate the ratio of line segments? (2) What does it mean that line segments AB, CD, EF, and GH are proportional? (3) You can quickly divide a rope into two pieces without measuring, so that the two parts...
Similar PPT courseware 3 of the graphic "Parallel lines are proportional to their segments":
"Parallel Lines Divide Line Segments into Proportions" Similar PPT Courseware for Graphics 3 Review Review 1. The concept of proportional line segments: Among the four line segments a, b, c, d, if a:b=c:d, then these four line segments a, b , c, and d are called proportional line segments, referred to as proportional line segments. 2. Ratio..
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Update Time: 2024-10-20
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