Page:Carroll - Euclid and His Modern Rivals.djvu/223

. § 1.] assert that 'two angles are formed by two straight lines drawn from a point.'

Min. Why, these are like Falstaff's 'rogues in buckram suits'! Are there more coming?

Nos. No, we do not go beyond the sum of four right angles. These two we call conjugate angles. 'The greater of the two is called the major conjugate, and the smaller the minor conjugate, angle.'

Min. These Definitions are wondrous! This is the first time I ever heard 'major' and 'minor' defined. One feels inclined to say, like that Judge in the story, when a certain barrister, talking against time, insisted on quoting authorities for the most elementary principles of law, 'Really, brother, there are some things the Court may be assumed to know!' Any more definitions?

Nos. We define 'a straight angle.'

Min. That I have discussed already (see p. 102).

Nos. But this, I think, is new:—

Reads. P. 9. Def 12. 'When three straight Lines are drawn from a point, if one of them be regarded as lying between the other two, the angles which this one (the mean) makes with the other two (the extremes) are said to be adjacent angles.'

Min. That is new indeed. Let us try a figure:—