I VARIETY F the Perpendicular be made Radiv * As Radius 90 1 Is to the Perpend. So is Secant of the fame To the Hypothenufe. DEMONSTRAT With the Centre C and any A. DF: BA:: CF; CA. QE D. F 3 estion 1. In the right angled Triangle C, there are given the Hypothenuse AC ind the Angle A 29° 57', to find the and Perpendicular. A 29.57 63 B LOGARITHMETICALLY. ICA I The Hypothenufe and Angles are here given to find the Bafe and Perpendicular. Turn to Plate 3, and you will foon perceive (No. 2 and 3) that your Proportion will run thus. As Secant of the 4C 60° 3' 10'301687 To the Bafe 5459 1.737090 And And for the Perpendicular, it is made Radius, therefore it must be, as fhewn No. 1, Plate 3. But first take either Part of the laft Proportion. As Secant of the 4C 6030' Is to the Hypoth. 63 So is Radius 90 To the Perpend. 31°45 Or, which will anfwer the fame Purpofe. As Tang. of the 4C 60°1, 301 ́ Î0°239436 Is to the Base 54'59 So is Radius 90 To the Perpend. 31°45 1'737090 10'000000 1*497654 Question 2. In the right angled Triangle A BC, are given the Perpendicular B C 3145 and Angle A 29°57', required the Base and Hypothenufe, Logarithmetically |