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ABCD AC is equal acute adjacent angles alternate angle altitude angle ABC angle ACB angle AFG angle BAC angles are equal angles equal Apply arms base bisectors bisects called centre coincide common Constr diagonal difference distance divided double draw equal to AC exterior angle extremities fall figure formed four Geometry given angle given point given straight line greater half Hence identically equal interior intersect isosceles triangle join less Let ABC locus meet middle point opposite angles opposite sides pair parallel parallelogram perpendicular plane point equidistant polygon Post Prob produced projection Prove quadrilateral radius rectangle contained remainder right angles segments shew side AB side AC square on AC straight line drawn surface THEOR Theorem triangle ABC twice the rectangle unequal vertex vertices whole Нур
Página 27 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Página 56 - ... is equal to twice as many right angles as the polygon
Página 101 - Prove that parallelograms on the same base and between the same parallels are equal in area.
Página 35 - Any two sides of a triangle are together greater than the third side.
Página 26 - The lines drawn from the extremities of the base of an isosceles triangle to the middle points of the opposite sides are equal.
Página 70 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 85 - The locus of a point at a given distance from a given point is the circumference described from the point with the given distance as radius.
Página 42 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Página 110 - Iff a straight line be divided into any two parts, four times the rectangle contained by the whole line, and one of the parts, together with the square of the other part, is equal to the square of the straight line which is made up of the whole and that part.