## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh and Twelfth |

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Page 4

Of three - sided figures , an equilateral triangle is that which has three equal

Of three - sided figures , an equilateral triangle is that which has three equal

**sides**XXV . An isosceles triangle is that which has only two**sides**equal . XXVI . A scalene triangle is that which has three unequal**sides**. XXVII . Page 5

Of four - sided figures , a square is that which has all its

Of four - sided figures , a square is that which has all its

**sides**equal , and all its angles right anglese XXXI . An oblong is that which has all its angles right angles , but has not all its**sides**equal . XXXII . Page 10

If two triangles have two

If two triangles have two

**sides**of the one equal to two**sides**of the other , each to each ; and have likewise the angles contained by those**sides**equal to one another ; they shall likewise have their buses , or third**sides**, equal ; and ... Page 11

Therefore , if two triangles have two

Therefore , if two triangles have two

**sides**of the one equal to two**sides**of the other , each to each , and have likewise the angles contained by those**sides**equal to one another , their bases shall likewise be equal , and the triangles ... Page 12

THEOR , If two angles of a triangle be egual to one another , the

THEOR , If two angles of a triangle be egual to one another , the

**sides**also which subtend or are opposite to the equal ... Let ABC be a triangle having the angle ABC equal to the angle ACB : the**side**AB shall be equal to the**side**AC .### What people are saying - Write a review

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The Elements of Euclid: Viz. The First Six Books, Together With the Eleventh ... Euclid Euclid No preview available - 2018 |

### Common terms and phrases

altitude angle ABC angle BAC base base BC BC is equal centre circle ABCD circumference common cone Const contained cylinder demonstrated described diameter divided double draw drawn equal angles equiangular equilateral equimultiples extremities fall figure fore four fourth given given straight line greater half inscribed join less Let ABC likewise magnitudes manner meet multiple opposite parallel parallelogram pass perpendicular plane polygon prism PROB produced PROP proportionals proved pyramid ratio reason rectangle contained rectilineal figure remaining angle right angles segment shown sides similar solid solid angle solid parallelopiped sphere square taken THEOR third touches triangle ABC vertex wherefore whole