sentences:  The book begins with a discussion that defines "aspects" for the different kinds of plane figures (quadrilateral, triangle, circle, and segment of a circle) in Chapter I (§1–5), and with the basic principles of measurement of areas (§6–9).In Chapter II, the work introduces concise rules for the measurement of plane figures (§1–4), as well as a few problems in the calculation of volume (§5–12).In Chapters III–V, the "Mishnat ha-Middot" explains again in detail the measurement of the four types of plane figures, with reference to numerical examples.