## Elementary geometry |

### Inni boken

Resultat 1-5 av 85

Side 5

In the

In the

**proof**it is frequently necessary to draw certain lines , or to conceive them as drawn . This is called the construction . REMARKS . Side 12

P D B R Part . En . Let ABC , PRS be right angles ; it is required to prove that ABC is equal to PRS .

P D B R Part . En . Let ABC , PRS be right angles ; it is required to prove that ABC is equal to PRS .

**Proof**. If the point B were placed on the point R ... Side 13

**Proof**. Because ABC is a straight line , ( Hyp . ) therefore the angle ABC is equal to two right angles ; ( Def . 14. ) ... Side 14

**Proof**. Because DBA and DBC are together equal to two right angles ; ( Hyp . ) and DBA and DBC , from the figure , make up the angle ABC ; therefore ABC is ... Side 20

... ABC be an isosceles triangle , having the side AB equal to the side AC ; it is required to prove that the angle B is equal to the angle C. B C x

... ABC be an isosceles triangle , having the side AB equal to the side AC ; it is required to prove that the angle B is equal to the angle C. B C x

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### Vanlige uttrykk og setninger

ABCD adjacent angle ABC angle APB angle BAC base bisect bisector Book called centre chord circle circumference coincide College common Constr construct converse Crown 8vo diagonals diameter difference distance divided draw drawn Edition ELEMENTARY equal angles Euclid Examples exterior angle extremities fall figure Find follows four Geometry given angle given point given straight line greater half Hence Illustrations included inscribed interior intersect isosceles triangle Join length less Let ABC line drawn locus magnitudes measure meet middle point minor arc opposite sides parallel parallelogram pass perpendicular placed polygon PROBLEM produced Professor Proof proportional quadrilateral radius ratio rectangle contained rectilineal figure regular required to prove respectively right angles School segment Shew sides similar Similarly square supplementary tangent THEOREM third touch triangle ABC unequal

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