Revision #941 → #1637 · back to history
addedTrapezoid0fb0b41c9648
addedBases and legs of a trapezoid225890e46d7f
addedExclusive definition of trapezoid3ffe7d9c02d9
addedInclusive definition of trapezoid41852b709894
addedTrapezoid as non-parallelogram quadrilateralefd7a6ef18d8
addedProper trapezoidb459ab71643c
addedIsosceles trapezoid864ce639bf1e
addedIsosceles trapezoid has equal legs and reflection symmetry12bc09960fb8
addedAcute trapezoidf490f0e1e736
addedThree-sided trapezoid48eb6e638391
addedIsosceles trapezoid is convex hull of antiparallelogramd0b9c2aea8e6
addedObtuse trapezoid628d9ab83b7e
addedRight trapezoidee68edbc21f4
addedGarfield's proof of Pythagorean theorem6b92e680e431
addedTangential trapezoid987bc37b5ab8
addedCondition of existence of a trapezoidda611946aa0e
addedCharacterizations of trapezoidse2f6357b356e
addedMidpoints of opposite sides and diagonal intersection collinear1fb731375600
addedCosines of adjacent angles sum to zero9c00c2b62c10
addedCotangents of adjacent angles sum to zero1cfdbc35f5fb
addedBimedian divides trapezoid into equal areas4cebdd5bfc65
addedBimedian length equals sum of other sides138e697dd5a5
addedFurther equivalent conditions for parallel sidesfbf05cc20eb4
addedMidsegment (median) of a trapezoidce921fd36d20
addedMidsegment length formula97e2cf1a7a63
addedHeight (altitude) of a trapezoid0cb0cbbac901
addedHeight from four side lengths9b4209a16cf7
addedArea of a trapezoidc5e8d4cdb378
addedBhāskara I's area formulade1335285f13
addedReduction to Heron's formulaa36cb702af9f
addedHeron-like area formula5428b2aa81e0
addedBimedian bisects area6590b08d8fa2
addedTriangle to midpoint of leg bisects aread5dbdedc82bf
addedDiagonal length formulaa7bc01f6e917
addedAreas of triangles formed by diagonalsa9a142817bce
addedHarmonic mean of bases through diagonal intersection48e9cdd59d5a
addedLine through diagonal and extended side intersections bisects basescd1bdfa912e0
addedCenter of area of a trapezoid0b28182ac936
addedRatio in which center of area divides segmentfbb9655aee2b
addedAngle bisector intersection propertye5beb06bdc83
addedTrapezoidal rule62af6668ead6
addedKeystone effect93149a8a3191
addedSpherical or hyperbolic trapezoidd99d938b3354
addedSaccheri quadrilateralff6701eb6296
addedLambert quadrilateral7a32c09a0c3f
addedTrapezoidal numberf2a7028575ad
addedCrossed ladders problem1b34f1471942