112

PROP. XIII.

Use. To find the perp, when the three sides of a triangle are given, and thence the Area.

BOOK II.

PROP. XIV. PROB.

To describe a square that shall be equal to a given rectilineal figure.

SOL. 45. I, Def. 30, Psts. 2. 3; 3. I, 10. I.

DEM. 5. II, Def. 15. 16. I, 47. I, Ax. 3, 1. I.

118

Aly & Arith. I'm

Given the fig. 1 = ab

36: in Area: required the side E IL =

of a square equal in Area.

2. To approximate to the square of curve-lined figures.

3. To calculate the areas of all right-lined figures.

PROP. XIV.

110