Updated on March 16, 2024

Describing a **triangle** with the right adjective not only paints a clearer picture but also enriches the text with precision and beauty. From the perfect symmetry of an *equilateral* triangle to the fundamental geometry of a *right* triangle, each adjective unfolds a world of shapes and sizes. An *isosceles* triangle hints at balance with two equal sides, while an *angled* descriptor dives into angular specifics. Even more intriguing is a *spherical* triangle, challenging our flat-surface biases. And the simplicity of a *small* triangle invites us to appreciate the subtleties of scale. Dive into the full list of adjectives to explore the nuanced world triangles inhabit.

equilateral | The equilateral triangle has three equal sides and angles. |

right | The hypotenuse of a right triangle is always longer than either of the other two sides. |

isosceles | The isosceles triangle has two equal sides. |

angled | The angled triangle has three sides of different lengths. |

spherical | The sum of the angles of a spherical triangle is greater than 180 degrees. |

small | The small triangle was so tiny that you could barely see it. |

posterior | The posterior triangle is bounded by the occipital bone, the mastoid process of the temporal bone, and the splenius capitis muscle. |

red | There was a red triangle on the wall. |

black | The black triangle was a ominous sign. |

inverted | The inverted triangle atop the church steeple was visible for miles around. |

anterior | The anterior triangle of the neck is a region of the neck located between the mandible and the sternum. |

eternal | The eternal triangle of love, betrayal, and revenge has been a staple of literature and drama for centuries. |

white | The white triangle was a symbol of peace and hope. |

upper | I filled in the upper triangle of the matrix with ones. |

lower | The lower triangle of the matrix contains the negative values. |

original | The original triangle was an isosceles triangle. |

blue | The blue triangle is a symbol of hope. |

oedipal | The oedipal triangle refers to the conflict that occurs between a child, their mother, and their father. |

green | The green triangle was a symbol of hope and peace. |

shaded | The shaded triangle was a beautiful sight to behold. |

submandibular | The submandibular triangle is an important anatomical region of the head and neck. |

golden | The Golden triangle is a region of Southeast Asia where the borders of Thailand, Laos, and Myanmar meet. |

pink | |

polar | The polar triangle is defined by the three great circles connecting the poles to the three vertices of the triangle. |

cervical | The cervical triangle is bordered superiorly by the mandible and inferiorly by the hyoid bone and sternocleidomastoid muscle |

perfect | The equilateral triangle is a perfect triangle |

obtuse | |

double | The double triangle is a geometric shape with six sides and four vertices. |

open | |

acute | I drew an acute triangle on the paper. |

strategic | The strategic triangle of the US, the Soviet Union, and China was in a state of flux. |

yellow | The yellow triangle is a warning sign. |

irregular | An irregular triangle has three sides that are not equal. |

smaller | We can cut out a smaller triangle from the corner of the bigger triangle. |

dark | |

solid | The solid triangle had a large base. |

pointing | Becky loves pointing triangles but others don't |

rightangled | In this geometry class, we learned about the interior angles of a rightangled triangle |

called | |

romantic | |

closed | The closed triangle had an area of 10 square units. |

tiny | |

urogenital | The urogenital triangle is a triangular area on the ventral surface of the abdomen. |

suboccipital | The suboccipital triangle is a triangular region of the posterior neck bounded by the trapezius muscle, the sternocleidomastoid muscle, and the midline. |

equiangular | The equiangular triangle has three equal angles. |

submaxillary | The incision follows the lower border of the submaxillary triangle to the level of the angle of the mandible. |

rough | The rough triangle was difficult to draw. |

oblique | The oblique triangle is characterized by having one or more angles that are not equal to 90 degrees. |

required | The required triangle can be cut from any rectangular piece of paper. |

astronomical | The astronomer used the astronomical triangle to calculate the distance to the star. |

anal | |

rectangular | The rectangular triangle has two sides that are perpendicular to each other. |

narrow | The narrow triangle was squeezed between the two larger shapes. |

inscribed | The inscribed triangle was a key part of the architect's design. |

ocellar | The ocellar triangle is an equilateral triangle located on the vertex of the head. |

submental | The submental triangle is an anatomical region located in the midline of the neck, between the lower border of the mandible and the hyoid bone. |

symmetrical | The symmetrical triangle formation is a bullish pattern that signals the continuation of an uptrend. |

elongated | The elongated triangle was an unusual sight to behold. |

vertical | The vertical triangle cast a long shadow. |

sided |

top | The top triangle of the square is shaded. |

occipital | The occipital triangle is located on the posterior aspect of the skull. |

superior | The superior triangle is bounded by the superior temporal sulcus, the lateral sulcus, and the sylvian fissure. |

pythagorean | |

digastric | Nerve fibers that stimulate muscle cells in the mylohyoid and digastric triangle regions are contained within the anterior division of mandibular nerve. |

lateral | That problem is a lateral triangle |

corresponding | The corresponding triangle has sides with lengths of 6 cm, 8 cm, and 10 cm. |

gray | A gray triangle appeared in the distance. |

diagonal | Triangles don't have diagonals, so there is no such thing as a diagonal triangle |

retromolar | The retromolar triangle is a small, triangular area located behind the last molar tooth. |

imaginary | The imaginary triangle was a fascinating concept to explore. |

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