## Introduction and books 1,2 |

### Inni boken

Side 153

When a straight line set up on a straight

the other is called a perpendicular to that on which it stands. 11. An obtuse angle

...

When a straight line set up on a straight

**line makes the adjacent angles equal to****one another, each of the**equal angles is right, and the straight line standing onthe other is called a perpendicular to that on which it stands. 11. An obtuse angle

...

Side 181

...

is right, and the straight line standing on the other is called a perpendicular to that

on which it stands. I 11. An obtuse angle is an angle greater than a right angle.

...

**line makes the adjacent angles equal to one another, each of the**equal anglesis right, and the straight line standing on the other is called a perpendicular to that

on which it stands. I 11. An obtuse angle is an angle greater than a right angle.

Side 269

... equal to the base FE ; therefore the angle DCF is equal to the angle ECF; [«• 8]

and they are adjacent angles. But, when a straight line set up on a straight

right ...

... equal to the base FE ; therefore the angle DCF is equal to the angle ECF; [«• 8]

and they are adjacent angles. But, when a straight line set up on a straight

**line****makes the adjacent angles equal to one another, each of the**equal angles isright ...

Side 271

... 35 therefore the angle CHG is equal to the angle EHC. [1.8] And they are

adjacent angles. But, when a straight line set up on a straight

straight ...

... 35 therefore the angle CHG is equal to the angle EHC. [1.8] And they are

adjacent angles. But, when a straight line set up on a straight

**line makes the****adjacent angles equal to one another, each of the**equal angles is right, and thestraight ...

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### Vanlige uttrykk og setninger

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### Populære avsnitt

Side 322 - AB be the given straight line ; it is required to divide it into two parts, so that the rectangle contained by the whole, and one of the parts, shall be equal to the square of the other part.

Side 204 - After remarking that the mathematician positively knows that the sum of the three angles of a triangle is equal to two right angles...

Side 259 - If two triangles have two sides of the one equal to two sides of the...

Side 188 - That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles.

Side 204 - In any triangle, the sum of the three angles is equal to two right angles, or 180°.

Side 162 - A plane angle is the inclination to one another of two lines in a plane which meet one another and do not lie in a straight line.

Side 167 - When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to that on which it stands.

Side 257 - Through a given point to draw a straight line parallel to a given straight line, Let A be the given point, and BC the given straight line : it is required to draw through the point A a straight line parallel to BC.

Side 176 - Parallel straight lines are straight lines which, being in the same plane and being produced indefinitely in both directions, do not meet one another in either direction.

Side 235 - Upon the same base, and on the same side of it, there cannot be two triangles that have their sides which are terminated in one extremity of' the base, equal to one another, and likewise those which are terminated in the other extremity.