## A Royal Road to Geometry: Or, an Easy and Familiar Introduction to the Mathematics. ... By Thomas Malton. ... |

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Page 241

In every

Thus , A : B , or B : A fignifying ; that A has some

neceffarily must if they be supposed to represent two Quantities of the

) ...

In every

**Ratio**there must necessarily be tuo Terms , denoting two Quantities . ...Thus , A : B , or B : A fignifying ; that A has some

**Ratio**to B , or B to A , ( which itneceffarily must if they be supposed to represent two Quantities of the

**same**kind) ...

Page 255

Thomas Malton. B A V. The ninth Propofition of Euclid . Quantities that have an

have the

to ...

Thomas Malton. B A V. The ninth Propofition of Euclid . Quantities that have an

**equal Ratio**to the same Quantity , or to equal Quantities , are equal . If A and Bhave the

**same Ratio**to C , or D ; A and B are equal . Also , if A has the fame Ratioto ...

Page 261

For , A may have to B , and C to Ď , & c . the

Diagonal , or as the Diagonal to the Side , & c . and A to C may be the

as the Diameter of a Circle to the Circumference ; and C to E , in extreme and ...

For , A may have to B , and C to Ď , & c . the

**Ratio**of the Side of a Square to itsDiagonal , or as the Diagonal to the Side , & c . and A to C may be the

**same**; or ,as the Diameter of a Circle to the Circumference ; and C to E , in extreme and ...

Page 389

Cylinders , having equal Altitudes , have the

Bases . For , similar Poligons , inscribed in Circles , are , to each other , as the

Squares of their Diameters . Th . 14. 6 . And it has been proved , that all Prisons ...

Cylinders , having equal Altitudes , have the

**same Ratio**to each ather as theirBases . For , similar Poligons , inscribed in Circles , are , to each other , as the

Squares of their Diameters . Th . 14. 6 . And it has been proved , that all Prisons ...

Page 391

The Poligons ABCDE , abcde , are similar - Hyp . wh . the Triangles ABE , a be , &

c . are similar . - 13.6 . and cons . the ... But , Quantities are in the

each other , as their Equimultiples or equal Parts . Ax.8.5 . and the triples of the ...

The Poligons ABCDE , abcde , are similar - Hyp . wh . the Triangles ABE , a be , &

c . are similar . - 13.6 . and cons . the ... But , Quantities are in the

**same Ratio**, toeach other , as their Equimultiples or equal Parts . Ax.8.5 . and the triples of the ...

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### Common terms and phrases

ABCD added alſo Altitudes analogous Area Baſe becauſe biſected Book called Center Chord Circle Circumference common Cone conf conſequently Conſtruction contained cuting Cylinder Demonſtration deſcribe Diagonal Diameter difference divided draw drawn equal Euclid evident extreme fame Feet Figure firſt formed four fourth given given Line greater half Hence Inches inſcribed join laſt leſs manner mean meaſure multiplied muſt oppoſite parallel Parallelogram Parallelopiped Pentagon perpendicular Plane Point Poligon Priſm Prob PROBLEM produced Proportion Propoſition proved Pyramid Quantities Radius Ratio Rect Rectangle reſpectively Right Angles Right Line ſame ſame Ratio ſay ſeeing Segment Sides ſimilar Solid ſome Sphere Square ſuch Surface taken Terms THEOREM third thoſe touch Triangle uſe wherefore whole whoſe

### Popular passages

Page 124 - When you have proved that the three angles of every triangle are equal to two right angles...

Page 221 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.

Page 285 - EG, let fall from a point in the circumference upon the diameter, is a mean proportional between the two segments of the diameter DS, EF (p.

Page 284 - IN a right-angled triangle, if a perpendicular be drawn from the right angle to the base, the triangles on each side of it are similar to the whole triangle, and to one another.

Page 186 - From this it is manifest, that if one angle of a triangle be equal to the other two, it is a right angle, because the angle adjacent to it is equal to the same two; and when the adjacent angles are equal, they are right angles.

Page 248 - To express that the ratio of A to B is equal to the ratio of C to D, we write the quantities thus : A : B : : C : D; and read, A is to B as C to D.

Page 161 - In any triangle, if a line be drawn from the vertex at right angles to the base; the difference of the squares of the sides is equal to the difference of the squares of the segments of the base.

Page 160 - In any isosceles triangle, the square of one of the equal sides is equal to the square of any straight line drawn from the vertex to the base plus the product of the segments of the base.

Page 250 - Ratios that are the same to the same ratio, are the same to one another. Let A be to B as C is to D ; and as C to D, so let E be to F.

Page 124 - Angles, taken together, is equal to Twice as many Right Angles, wanting four, as the Figure has Sides.