STD IX – GEOMETRY – ARCHIMEDES
About Course
CONGRUENCY OF TRIANGLES
MIDPOINT THEOREM
Midpoint theorem states that, the line joining the midpoints of two sides of a triangle is parallel to the third side and half of the length of the third side
In △ PQR, S and T are the midpoints of side PQ and PR
∴ ST || QR
And, ST = 1/2 QR
Converse of midpoint theorem states that if a line is drawn through the midpoint of one side of a triangle, and parallel to the other side, it bisects the third side
In △ PQR, S is the midpoints of side PQ and PR, and ST || QR
∴ ST = 1/2 QR
and, T is the midpoint of side PR
Equal Intercept Theorem states that if equal intercepts are made on three or more parallel lines by a transversal, then the intercept made by any other line on these lines will also be equal.
PYTHAGORAS THEOREM
RECTILINEAR FIGURES
CIRCLES
Course Content
TRIANGLE – CONGRUENCY OF TRIANGLE – FUNDAMENTAL CONCEPT
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31:39
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17:23
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17:23
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10:07
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12:43
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19:08
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20:08
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14:57
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24:36
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21:51
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08:35
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11:15
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06:41
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06:59
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10:10
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03:44
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16:54
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07:19
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11:30
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[PHYSICAL] [RHEA] CONGRUENCY OF TRIANGLES – SIMPLE NUMERICAL BASED ON CPTCTC – PART I
12:51 -
07:13
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13:16
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31:50
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QUIZ – EXERCISE A – TRIANGLES – CONGRUENCE OF TRIANGLES PRELIMINARY
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22:17
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21:17
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22:27
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09:03
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23:23
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23:23
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14:17
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21:29
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17:35
MID-POINT THEOREM – PROOF OF MID-POINT AND CONVERSE THEOREM
PHYTHAGORAS THEOREM – NUMERICAL BASED ON PYTHAGORAS THEOREMS
CONSTRUCTION OF POLYGONS – CONSTRUCT A PARALLELOGRAM AND RHOMBUS
RECTILINEAR FIGURES – NUMERICALS
CIRCLE – THEOREMS
AREA THEOREM – THEOREMS
ADDITINAL MATERIAL
ASSIGNMENT AND DUE DATES
RECTILINEAR FIGURES – APRIL 2024
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