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If the square described upon one of the sides of a triangle, be equal to the squares described upon the other two sides of it ; the angle contained by these two sides is a right angle.
The Elements of Euclid [book 1] for beginners, by J. Lowres - Page 39
by Euclides - 1852

## Minutes ...: Correspondence, Financial Statements, Etc., and ..., Volume 2

Great Britain. Committee on Education - 1850 - 914 pages
...together with four right angles, are equal to twice as many right angles as the figure has sides. 2. If the square described upon one side of a triangle be equal to the sum of the squares described upon the other two sides of it, the angle contained by these two sides...

## The first two books of the Elements of Euclid, with additional figures ...

Euclides - 1852 - 152 pages
...any right,angled triangle, &c. QED PROP. XLVIII. THEOR. If the square described upon one of the sides of a triangle, be equal to the squares described upon the other two sides ofit; the angle contained by these two sides is a right angle. If the square described upon BC, one...

## The first six books of the Elements of Euclid, with numerous exercises

Euclides - 1853 - 176 pages
...rightangled triangle, &c. QED PEOPOSITION XL VIII. — THEOREM. If the square described upon one of the sides of a triangle be equal to the squares described upon the, other two sides of it ; the angle contained by these two sides is a right angle. IF the square described upon b С,...

## The synoptical Euclid; being the first four books of Euclid's Elements of ...

Euclides - 1853 - 146 pages
...right-angled triangle, &c. QED PROP. XLVIII. — THEOREM. If the square described upon one of the sides of a triangle, be equal to the squares described upon the other two sides of it; the angle contained by these two sides is a right angle. If the square described upon BC, one...

## The geometry, by T. S. Davies. Conic sections, by Stephen Fenwick

Royal Military Academy, Woolwich - Mathematics - 1853 - 400 pages
...right-angled triangle, etc. QED PROPOSITION XLVIII. THEOR. If the square described upon one of the sides of a triangle be equal to the squares described upon the other two sides of it, the angle contained by these two sides is a right angle. If the square described upon BC, one...

## The Elements of geometry; or, The first six books, with the eleventh and ...

Euclides - 1855 - 262 pages
...perpendicular, and conversely. PROP. XLVIII. THEOREM. If the square described upon one of the sides of a triangle, be equal to the squares described upon the other two sides of it ; the angle contained by these two sides is a right angle. Let the square described upon B С,...

## Minutes of the Committee of Council on Education

Great Britain. Committee on Education - School buildings - 1855 - 976 pages
...the same side of it, are between the same parallels. 2. If the square described upon one of the sides of a triangle be equal to the squares described upon the other two sides of it, the angle contained by those two sides is a right angle. 3. Divide a straight line into two...

## Cambridge examination papers: a suppl. to the University calendar, 1856-59

Cambridge univ, exam. papers - 1856 - 252 pages
...other extremities shall be parallel to the first. 6. If the square described upon one of the sides of a triangle, be equal to the squares described upon the other two sides of it ; the angle contained by these two sides is a right angle. 6. If there be two straight lines,...