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hods for connecting apparatus to a three-phase circuit, the three corners of the delta or triangle, as diagrammatically represented, being connected to the three wires of the supply circuit.

Shaped like the Greek Deltoid leaf (Bot.), a leaf in the form of a triangle with the stem inserted at the middle of the base. -- Deltoid muscle (Anat.), a triangular muscle in the shoulder which serves to move the arm directly upward.

Having equal legs or sides; isosceles. [R.] "Equicrural triangles." Sir T. Browne.

Having all the sides equal; as, an equilateral triangle; an equilateral polygon. Equilateral hyperbola (Geom.), one whose axes are equal. -- Equilateral shell (Zoöl.), one in which a transverse line drawn through the apex of the umbo bisects the valve, or divides it into two equal and symmetrical parts. -- Mutually e…

admitting of superposition; -- applied to magnitudes; as, a square may be equivalent to a triangle.

Drawn outside of; -- used to designate a circle that touches one of the sides of a given triangle, and also the other two sides produced.

Spherical excess (Geom.), the amount by which the sum of the three angles of a spherical triangle exceeds two right angles. The spherical excess is proportional to the area of the triangle.

s of a state or kingdom. Exterior angle (Geom.), the angle included between any side of a triangle or polygon and the prolongation of the adjacent side; also, an angle included between a line crossing two parallel lines and either of the latter on the outside. -- Exterior side (Fort.), the side of the polygon upon whi…

esenting them are capable of symmetrical arrangement in different geometrical figures, as triangles, squares, pentagons, etc.

cing gums, etc.; a kind of lancet. Fleam tooth, a tooth of a saw shaped like an isosceles triangle; a peg tooth. Knight.

nately in opposite directions so as to divide the space between the bars into a series of triangles. Knight. -- Sandwich girder, a girder consisting of two parallel wooden beams, between which is an iron plate, the whole clamped together by iron bolts.

A figure composed of two equal triangles intersecting so that each side of one triangle is parallel to a side of the other, and the six points coincide with those of a hexagon.

The side of a right-angled triangle that is opposite to the right angle.

undertake to convict a man of idiocy, if he can not see the proof that three angles of a triangle are equal to two right angles. F. W. Robertson.

The center of the circle inscribed in a triangle.

Having two legs or sides that are equal; -- said of a triangle.

Making a right angle; perpendicular, as two lines or two sides of a triangle, which include a right angle.

ca. See below. Lateen sail. Etym: [F. voile latine a sail in the shape of a right- angled triangle; cf. It. & Sp. vela latina; properly Latin sail. See Latin.] (Naut.) A triangular sail, extended by a long yard, which is slung at about one fourth of its length from the lower end, to a low mast, this end being brought d…

urve) (Geom.), the branches of the curve which extend outward indefinitely. -- Legs of a triangle, the sides of a triangle; -- a name seldom used unless one of the sides is first distinguished by some appropriate term; as, the hypothenuse and two legs of a right-angled triangle. On one's legs, standing to speak. -- O…

mesial plane meets the surface of the body. (b) (Geom.) The line drawn from an angle of a triangle to the middle of the opposite side; any line having the nature of a diameter. -- Median plane (Anat.), the mesial plane. -- Median point (Geom.), the point where the three median lines of a triangle mutually intersect.…