Elementary plane geometry : inductive and deductive / by Alfred Baker . aper will be found better than rough. Points and the ends of lines should be marked by indentationsmade with a needle or with the sharp points of the aividers, A piece of smooth, perfectly flat board, about a foot square,Avill be found as a drawing board. In all cases the pupil should construct for himself the necessaryfigures, and not content himself with those in the book, which aremerely intended as suggestions. It will be usually found desir-able to make figures on a larger scale than those in the text. The cha
Elementary plane geometry : inductive and deductive / by Alfred Baker . aper will be found better than rough. Points and the ends of lines should be marked by indentationsmade with a needle or with the sharp points of the aividers, A piece of smooth, perfectly flat board, about a foot square,Avill be found as a drawing board. In all cases the pupil should construct for himself the necessaryfigures, and not content himself with those in the book, which aremerely intended as suggestions. It will be usually found desir-able to make figures on a larger scale than those in the text. The chapters on similar triangles may be taken up, if thoughtdesirable, as soon as the pupil has obtained an acquaintance withparallel lines, and knows that the opposite sides and angles ofparallelograms are equal. Prominence may then be given toExercise 17, Chapter xxi., which suggests a demonstration of the47th, Book I., Euclid. CHAPTER I. Geometrical Elements. A straight line : It is evidently the shortest distance between its ends. A broken line A curved line An single:. The size of the angle does not depend on the lengthsof the bounding lines AB and AC, but on the amountof divergence of these lines from one another. Thusthe angle P is greater than the angle Q, and the angleR is less than the angle Q.
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