triangle

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triangle

 [tri´ang-g'l]
a three-cornered object, figure, or area, such as a delineated area on the surface of the body; called also trigone.
carotid triangle, inferior that between the median line of the neck in front, the sternocleidomastoid muscle, and the anterior belly of the omohyoid muscle.
carotid triangle, superior carotid trigone.
cephalic triangle one on the anteroposterior plane of the skull, between lines from the occiput to the forehead and to the chin, and from the chin to the forehead.
digastric triangle submandibular triangle.
Einthoven's triangle an imaginary equilateral triangle with the heart at its center, formed by the axes of the three bipolar limb leads.
Einthoven's triangle. Bipolar limb leads I, II, and III form Einthoven's triangle. Other standard positions for electrocardiographic leads are the augmented unipolar leads: aVR (right arm), aVL (left arm), and aVF (left leg). From Polaski and Tatro, 1996.
triangle of elbow a triangular area on the front of the elbow, bounded by the brachioradial muscle on the outside and the round pronator muscle inside, with the base toward the humerus.
triangle of election superior carotid triangle.
facial triangle a triangular area whose points are the basion and the alveolar and nasal points.
femoral triangle the area formed superiorly by the inguinal ligament, laterally by the sartorius muscle, and medially by the adductor longus muscle; called also Scarpa's triangle.
infraclavicular triangle that formed by the clavicle above, the upper border of the greater pectoral muscle on the inside, and the anterior border of the deltoid muscle on the outside.
inguinal triangle the triangular area bounded by the inner edge of the sartorius muscle, the inguinal ligament, and the outer edge of the long adductor muscle.
lumbocostoabdominal triangle that lying between the external oblique muscle of the abdomen, the posterior inferior serratus muscle, the erector muscle of the spine, and the internal oblique muscle of the abdomen.
occipital triangle the area bounded by the sternocleidomastoid muscle in front, the trapezius muscle behind, and the omohyoid muscle below.
Scarpa's triangle femoral triangle.
subclavian triangle a triangular area bounded by the clavicle, the sternocleidomastoid muscle, and the omohyoid muscle.
suboccipital triangle that lying between the posterior greater rectus muscle of the head and the superior and inferior oblique muscles of the head.

tri·an·gle

(trī'ang-gĕl), [TA]
In anatomy and surgery, a three-sided area with arbitrary or natural boundaries.
See also: trigonum, region.
[L. triangulum, fr. tri-, three, + angulus, angle]

tri·an·gle

(trī'ang-gĕl) [TA]
anatomy, surgery A three-sided area with arbitrary or natural boundaries.
See also: trigonum, region
[L. triangulum, fr. tri-, three, + angulus, angle]

tri·an·gle

(trī'ang-gĕl) [TA]
In anatomy and surgery, three-sided area with arbitrary or natural boundaries.
[L. triangulum, fr. tri-, three, + angulus, angle]
References in periodicals archive ?
Therefore, if we rephrase the question such that the area of Triangle A is 5 [cm.sup.2] and the area of Triangle B is 20 [cm.sup.2], then the question will not only be mathematically consistent, but it will also contain all whole numbers.
In all the items, she consistently computed the area of triangle in the order of 1/2 x height x base instead of 1/2 x base x height, even though the latter is more conventional and certainly the one highlighted by the teacher.
This article aims to provide an overview of background theory and research of the geometric nature of triangles and suggest some practical solutions for improving the understanding and experiences of students in the area of triangles and their properties.
Mathematics of the first year in high school includes: Sets, Real and Complex numbers, Discriminant, Cubic and Quartic Equations, Quadratic Inequality, Means, Distribution and Standard Deviation, Equation of Lines, Equation of Circles, Parallel Transformation, Composite Functions, Inverse Functions, Maxima and Minima of Quadratic Functions, Rational Functions, Radians, Trigonometric Functions, Laws of Sine and Cosine, Area of Triangles.