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  2. Trapezoid - Wikipedia

    en.wikipedia.org/wiki/Trapezoid

    It has two adjacent angles that are supplementary, that is, they add up to 180 degrees. The angle between a side and a diagonal is equal to the angle between the opposite side and the same diagonal. The diagonals cut each other in mutually the same ratio (this ratio is the same as that between the lengths of the parallel sides).

  3. Sum of angles of a triangle - Wikipedia

    en.wikipedia.org/wiki/Sum_of_angles_of_a_triangle

    In a Euclidean space, the sum of angles of a triangle equals a straight angle (180 degrees, π radians, two right angles, or a half-turn). A triangle has three angles, one at each vertex, bounded by a pair of adjacent sides. It was unknown for a long time whether other geometries exist, for which this sum is different. The influence of this ...

  4. Quadrilateral - Wikipedia

    en.wikipedia.org/wiki/Quadrilateral

    In a crossed quadrilateral, the four "interior" angles on either side of the crossing (two acute and two reflex, all on the left or all on the right as the figure is traced out) add up to 720°. [10] Crossed trapezoid (US) or trapezium (Commonwealth): [11] a crossed quadrilateral in which one pair of nonadjacent sides is parallel (like a ...

  5. Angle - Wikipedia

    en.wikipedia.org/wiki/Angle

    In Euclidean geometry, the measures of the interior angles of a triangle add up to ... For example, 3° 30′ is equal to 3 × 60 + 30 = 210 minutes or 3 + ...

  6. Trapezium - Wikipedia

    en.wikipedia.org/wiki/Trapezium

    Trapezium, plural trapezia, may refer to: Trapezium, in British and other forms of English, a trapezoid, a quadrilateral that has exactly one pair of parallel sides; Trapezium, in North American English, an irregular quadrilateral with no sides parallel; Trapezium (bone), a bone in the hand; Trapezium Cluster, a group of stars in the Orion Nebula

  7. Today’s NYT ‘Strands’ Hints, Spangram and Answers for Friday ...

    www.aol.com/today-nyt-strands-hints-spangram...

    Up Next: - NYT ‘Connections’ Hints and Answers Today, Friday, December 13. Related: 15 Fun Games Like Connections to Play Every Day. Show comments. Advertisement. Advertisement.

  8. Angular defect - Wikipedia

    en.wikipedia.org/wiki/Angular_defect

    Classically the defect arises in two contexts: in the Euclidean plane, angles about a point add up to 360°, while interior angles in a triangle add up to 180°. However, on a convex polyhedron , the angles of the faces meeting at a vertex add up to less than 360° (a defect), while the angles at some vertices of a nonconvex polyhedron may add ...

  9. The 15 Best Core Workouts You Can Do at Home, No ... - AOL

    www.aol.com/15-best-core-workouts-home-100000707...

    Hold for 30 to 60 seconds and release. 2. Spider-Man Plank ... Step 1: Lie on your back with your legs straight up in the air at a 90-degree angle (add a slight bend in your knees if needed ...