PROP. XLIV. PROB. To a given line to apply a parallelogram which shall be equal to a given triangle, and ha

of its angles equal to a given angle.

SOL. P. 42. 31. Pst. 1. 2.

DEM. P. 29. Ax. 9. 12. P. 43, Ax. 1. P. 15.

PROP. XLV. PROB. To describe a parallelogram equal to a given rectilineal figure, and having an angle equal

given rectilineal angle.

SOL. Pst. 1. P. 42. 44.

DEM. AX. 1. 2. P. 29. 14. 30. Def. A.

PROP. XLVI. PROB. To describe a square on a given st. line.

SOL. P. 11. 3. 31 Def. A.

DEM. P. 34. Ax. 1. P. 29. Ax. 3. Def. 30.

EXP. 1 Datum.

2 Quæs.

CON. 1 P. 11.

2 P. 3.

3 P. 31.

4 Def. A.

5 Sol.

DEM. 1 P. 34. C. 2.

2 Ax. 1.

3 D. 1. 2.

4 C. 3.

5 P. 29.

6 C. 1.

7 Ax. 3.