## Logical Sequence in Plane Geometry |

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ABCD Additional Theorems adjacent angles Alternate angles altitude angles are equal base becomes called centre chord circle circle are equal circumference clear common complete congruent considered CONSTRUCTIONS not essential converse corresponding angles corresponding sides deduced diagonals diagrams Discuss equal in area equal to four exactly exterior angle facts figure finite straight line fixed points formed four right angles hypotenuse idea included angle indicate intercepts interior introduce involves language later leads length logical sequence means Measure Note number of units obtained opposite angles opposite sides Orthocentre pair parallel parallel sides parallel straight lines parallelogram perpendicular bisector PLANE GEOMETRY points thus determined polygon precise definition proof properties proportion proved quadrilateral quantity RAPID REVISION ratio reasoning rectangle REVISION PROCESS rhombus right-angled triangle segment sheet similar square straight line subtends straight lines cut straight lines intersect supplementary tangent interval transversal trapezium triangle vertex