## Wentworth's Plane Geometry |

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### Common terms and phrases

angle arc BC arcs CD breadth or thickness called a surface circles intersect circles is called comes nearer common chord common external tangent common internal tangent Common Tangents CQ are parallel cut the line-segment diameter BD diameter perpen dicular difference dimensions Draw OA drawn through four example EXERCISE 29 external tangent figure CF four points geometric line geometric solid grees hence hexagon here shown internal tangent joining the centers length limited portion line of centers line-segment equal line-segment greater line-segment joining line-segment less mid-point nearer and nearer nearer to representing opposite sides parallel tangents meeting perpendicular bisector physical solid plane portion of space PROPOSITION Prove that AB+CD+EF Prove that AP quadrilateral radii reasoning Show side tangent sides is equal simply the boundary solid shown space is called straight angle straight edge straight line sum but greater THEOREM 195 thickness is called width

### Popular passages

Page 9 - Two triangles having an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles.

Page 8 - If in a right triangle a perpendicular is drawn from the vertex of the right angle to the hypotenuse : I.

Page 11 - In the same circle or in equal circles, if two chords are unequally distant from the center, they are unequal, and the chord at the less distance is the greater.