Volume 1

The young trigonometer's compleat guide. Being the mystery and rationale of plane trigonometry made clear and easy / [Benjamin Martin].

  • Martin, Benjamin, 1705-1782.
Date:
1736
Catalogue details

Licence: Public Domain Mark

Credit: The young trigonometer's compleat guide. Being the mystery and rationale of plane trigonometry made clear and easy / [Benjamin Martin]. Source: Wellcome Collection.

    22/354 (page 2)
    WJ *Plain Trigonometry. V- A Right-Angle is includ¬ ed between two Lines perpen¬ dicular to each other ; as the Right Angle A, cr B. VI. An Obtufe Angle is great¬ er than a Right Angle; as the Angle ABC. VII. An Acute Angle is lefs than a Right Angie; as the Angle DEF. ViII. A Circle is a plain Su¬ perficies, whole Area is limited by perfedt Round Line; as the Figure B. IX. The :Periphery or Cir¬ cumference of a Circle is the Round Line that bounds it: A, B, C X. The Center of a Circle is the Point C, every way equally diftant from the Periphery. XI. The Diameter of a Cir¬ cle is a Line palling through the Center, and ending at the Peri¬ phery on each Side; as the Line AB. XII*