This document is a presentation on analytic geometry that was compiled from 6 different sources. It introduces analytic geometry and its history, developed by Descartes and Fermat in the 1630s. It explains that analytic geometry uses algebraic equations to describe geometric shapes on a coordinate system. This allows geometric relationships to be represented by algebraic equations using techniques like slope, gradients, and intercepts. It also covers topics like the Cartesian plane, lines, perpendicular and parallel lines, and finding equations of lines.
Properties of parallelogram applies to rectangles, rhombi and squares.
In a parallelogram,
Opposite sides of a parallelogram are parallel.
A diagonal of a parallelogram divides it into two congruent triangles.
Opposite sides of a parallelogram are congruent.
Opposite angles of a parallelogram are congruent.
If one angle of a parallelogram is right, then all the angles are right.
Consecutive angles of a parallelogram are supplementary.
Diagonals of a parallelogram bisect each other.
https://www.youtube.com/channel/UCOuMfD4sggCh7XeiAHlus6Q
This powerpoint presentation is an introduction for the topic TRIANGLE CONGRUENCE. This topic is in Grade 8 Mathematics. I hope that you will learn something from this sides.
Properties of parallelogram applies to rectangles, rhombi and squares.
In a parallelogram,
Opposite sides of a parallelogram are parallel.
A diagonal of a parallelogram divides it into two congruent triangles.
Opposite sides of a parallelogram are congruent.
Opposite angles of a parallelogram are congruent.
If one angle of a parallelogram is right, then all the angles are right.
Consecutive angles of a parallelogram are supplementary.
Diagonals of a parallelogram bisect each other.
https://www.youtube.com/channel/UCOuMfD4sggCh7XeiAHlus6Q
This powerpoint presentation is an introduction for the topic TRIANGLE CONGRUENCE. This topic is in Grade 8 Mathematics. I hope that you will learn something from this sides.
Geometry (Ancient Greek: γεωμετρία; geo = earth, metria = measure) is a part of mathematics concerned with questions of size, shape, and relative position of figures and with properties of space. Geometry is one of the oldest sciences. Initially a body of practical knowledge concerning lengths, areas, and volumes, in the third century BC geometry was put into an axiomatic form by Euclid, whose treatment—Euclidean geometry—set a standard for many centuries to follow. The field of astronomy, especially mapping the positions of the stars and planets on the celestial sphere, served as an important source of geometric problems during the next one and a half millennia. A mathematician who works in the field of geometry is called a geometer.
Introduction of coordinates by René Descartes and the concurrent development of algebra marked a new stage for geometry, since geometric figures, such as plane curves, could now be represented analytically, i.e., with functions and equations. This played a key role in the emergence of calculus in the 17th century. Furthermore, the theory of perspective showed that there is more to geometry than just the metric properties of figures. The subject of geometry was further enriched by the study of intrinsic structure of geometric objects that originated with Euler and Gauss and led to the creation of topology and differential geometry.
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Mapping the plane
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Distance formula
Properties of distance
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7. HISTORY
Introduced in the 1630s , an important
mathematical development, for it laid
the foundations for modern
mathematics as well as
Aided the development of calculus
RENE DESCARTES (1596-1650) and
PIERRE DE FERMAT (1601-1665),
French mathematicians,
independently developed
the foundations for
analytical geometry
8. ANALYTIC GEOMETRY
• A branch of mathematics which
uses algebraic equations to
describe the size and position
of geometric figures on a
coordinate system.
9. ANALYTIC GEOMETRY
• The link between algebra and
geometry was made possible by the
development of a coordinate system
which allowed geometric ideas, such
as point and line, to be described in
algebraic terms like real numbers
and equations.
• Also known as Cartesian geometry
or coordinate geometry.
10. ANALYTIC GEOMETRY
• The use of a coordinate system to relate
geometric points to real numbers is the
central idea of analytic geometry.
• By defining each point with a unique set
of real numbers, geometric figures such
as lines, circles, and conics can be
described with algebraic equations.
11. CARTESIAN PLANE
• The Cartesian plane, the basis of analytic
geometry, allows algebraic equations to be
graphically represented, in a process called
graphing.
• It is actually the graphical representation of
an algebraic equation, of any form -- graphs
of polynomials, rational functions, conic
sections, hyperbolas, exponential and
logarithmic functions, trigonometric functions,
and even vectors.
12. CARTESIAN PLANE
• x-axis (horizontal axis)
where the x values are
plotted along.
• y-axis (vertical axis)
where the y values are
plotted along.
• origin, symbolized by 0,
marks the value of 0 of
both axes
• coordinates are given
in the form (x,y) and is
used to represent
different points on the
plane.
13. INCLINATION OF A LINE
• The smallest angle θ, greater than
or equal to 0°, that the line makes
with the positive direction of the xaxis (0° ≤ θ < 180°)
• Inclination of a horizontal line is 0.
• The tangent of the inclination
m = tan θ
16. ANGLE BETWEEN TWO LINES
• If θ is angle, measured counter clockwise,
between two lines, then
• where m2 is the slope of the terminal side
and m1 is the slope of the initial side
17.
18.
19.
20.
21. A point is an ordered pair of numbers written as (x; y).
●
Distance is a measure of the length between two points.
●
The formula for finding the distance between any two points is:
●
22.
23.
24. The formula for finding the mid-point between two points is:
25.
26. SLOPE OF A LINE
• The slope or gradient of a line describes the
steepness, incline or grade.
• A higher slope value indicates a steeper
incline.
• Slope is normally described by the ratio of the
“rise” divided by the “run” between two points
on a line.
• The slope is denoted by 𝒎.
27.
28. Gradient between two points
The gradient between two points is determined by the ratio of vertical
●
change to horizontal change.
The formula for finding the gradient of a line is:
●
29. SLOPE OF A LINE
• If line rises from left to right,
• If line goes from right to left,
• If line is parallel to x-axis,
•If line is parallel to y-axis,
𝒎> 𝒐
𝒎< 𝟎
𝒎= 𝟎
𝒎 = 𝒖𝒏𝒅𝒆𝒇𝒊𝒏𝒆𝒅
30. • Two non-vertical lines are parallel if, and only if, their
slopes are equal.
• Two slant lines are perpendicular if, and only if, the slope
of one is the negative reciprocal of the slope of the
other..(If two lines are perpendicular, the product of their
gradients is equal to −1.)
•
For horizontal lines the gradient is equal to 0.
•
For vertical lines the gradient is undefined.
31.
32.
33. If 2 lines with gradients m1 and m2 are perpendicular then m1 × m2 = -1
Conversely:
If m1 × m2 = -1 then the two lines with gradients m1 and m2 are perpendicular.
36. Find the equation of the line which passes
through the point (-1, 3) and is perpendicular to
the line with equation
4x y 1 0
37. SOLUTION
Find gradient of given line: 4 x y 1 0 y 4 x 1 m 4
Find gradient of perpendicular:
Find equation:
m
1
(using formula m m 1)
1
2
4
y – b = m(x – a)
y – 3 = ¼ (x –(-1))
4y – 12 = x + 1
4 y x 13 0
38.
39.
40.
41.
42. This presentation is a mash up of 6 different sources. These are:
Felipe, N, M. (2014). Analytical geometry basic concepts [PowerPoint
Presentation]. Available at: http://www.slideshare.net/NancyFelipe1/analyticgeometry-basic-concepts. Accessed on: 6 March 2014.
Demirdag, D. (2013). Lecture #4 analytic geometry [PowerPoint
Presentation]. Available at:
http://www.slideshare.net/denmarmarasigan/lecture-4-analytic-geometry.
Accessed on: 6 March 2014.
Share, S. (2014). Analytical geometry [PowerPoint Presentation]. Available
at: http://www.slideshare.net/SuziShare/analytical-geometry. Accessed on: 6
March 2014.
Derirdag, D. (2012).Analytical geometry [PowerPoint Presentation]. Available
at: http://www.slideshare.net/mstfdemirdag/analytic-geometry. Accessed on:
6 March 2014.
Nolasco, C, M. Analytical geometry [PowerPoint Presentation]. Available at:
http://www.slideshare.net/CecilleMaeNolasco/analytical-geometry. Accessed
on: 6 March 2014.
Siyavula_Education. (2012).Analytical geometry Everything Maths, Grade
10 [PowerPoint Presentation}. Available at:
http://www.slideshare.net/Siyavula_Education/analyticalgeometry?qid=9526d5d1-098f-45da-90b6d503de7f2db5&v=default&b=&from_search=4). Accessed on: 6 March 2014.