Books Books
If one side of a triangle be produced, the exterior angle is greater than either of the interior opposite angles.
The first six books of the Elements of Euclid, with numerous exercises - Page 13
by Euclides - 1853 - 147 pages

## The Cambridge Examiner, Volume 2

Education, Higher - 1882 - 498 pages
...together equal to two right angles, these two straight lines are in one and the same straight line. 6. If one side of a triangle be produced, the exterior...greater than either of the interior opposite angles. 7. The greater side of every triangle is opposite to the greater angle. 8. Place a straight line of...

## The Competitor, Volumes 3-4

1883 - 248 pages
...between the angles which the line drawn across makes with the two parallel straight lines. 4. Prove that, if one side of a triangle be produced, the exterior angle is equal to the sum of the two interior and opposite angles, and that the three angles of every triangle...

## The Elements of Plane and Solid Geometry: With Chapters on Mensuration and ...

Isaac Sharpless - Geometry - 1882 - 286 pages
...the alternate angles EAD, ADC are equal, EF is parallel (I. 25) to BC. Proposition 30. Theorcm. — If one side of a triangle be produced, the exterior angle is equal to the two opposite interior angles; and the three interior angles of any triangle are equal...

## The Practical Teacher, Volume 2

Education - 1883 - 654 pages
...equal to the angle contained by the two lides equal to them of the other. See Prop. VIII. Bk. I. 3. If one side of a triangle be produced, the exterior...greater than either of the interior opposite angles. See Prop. XVI. Bk. I. 20 [MARCH, 1882. Music. A quarter of an hour allmved far this Paptr. i. Write,...

## Geometry for schools, comprising books i. and ii. of Euclid, with some ...

Euclides - 1883 - 176 pages
...equal. 35. The bisectors of two opposite vertical angles are in the same straight line. PROP. 16. THEOR. If one side of a triangle be produced, the exterior...greater than either of the interior opposite angles. Given ABAC, having BC produced to D. To prove L. ACD > either i. A or L. ABC. Bisect AC at E (/. 10)....

## The Practical Teacher; with which is Incorporated the Practical ..., Volume 2

Joseph Hughes - Education - 1883 - 568 pages
...equal to the angle contained by the two sides equal to them of the other. See Prop. VIII. Bk. I. 3. If one side of a triangle be produced, the exterior...greater than either of the interior opposite angles. See Prop. XVI. Bk. I. THE PRACTICAL TEACHER. [MARCH, 1882. Music. A quarter of an h«ur allowed for...

## Syllabus of plane geometry, books 1-3, corresponding to Euclid, books 1-4 ...

Mathematical association - 1883 - 86 pages
...Superposition.] COR. If a triangle is equiangular, it is also equilateral. THEOR. 9. If any side of a triangle is produced, the exterior angle is greater than either of the interior opposite angles. THEOR. 10. Any two angles of a triangle are together less than two right angles. COR. 1. If a triangle...

## The Elements of Euclid for the Use of Schools and Colleges: Comprising the ...

Euclid, Isaac Todhunter - Euclid's Elements - 1883 - 428 pages
...number of straight lines meeting at one point, are together equal to four right angles. PROPOSITION 16. THEOREM. If one side of a triangle be produced, the exterior angle shall be greater than either of the interior opposite angles. Let ABC be a triangle, and let one side...