"midpoint theorem" meaning in English

{
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    {
      "form": "the midpoint theorem",
      "tags": [
        "canonical"
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  "head_templates": [
    {
      "args": {
        "def": "1"
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      "expansion": "the midpoint theorem",
      "name": "en-prop"
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "_dis": "70 30",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w+disamb"
        },
        {
          "_dis": "70 30",
          "kind": "topical",
          "langcode": "en",
          "name": "Geometry",
          "orig": "en:Geometry",
          "parents": [
            "Mathematics",
            "Formal sciences",
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          "source": "w+disamb"
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      ],
      "glosses": [
        "A theorem stating that if the midpoints of two sides of a triangle are connected, the resulting line segment will be parallel to the third side and have half of its length."
      ],
      "id": "en-midpoint_theorem-en-name-koQKyChu",
      "links": [
        [
          "triangle",
          "triangle"
        ],
        [
          "parallel",
          "parallel"
        ]
      ],
      "synonyms": [
        {
          "word": "midline theorem"
        }
      ]
    },
    {
      "glosses": [
        "A theorem stating that the midpoints of parallel chords in a conic are located on a common line."
      ],
      "id": "en-midpoint_theorem-en-name-CdPPK3DF",
      "links": [
        [
          "chord",
          "chord"
        ],
        [
          "conic",
          "conic"
        ]
      ]
    }
  ],
  "word": "midpoint theorem"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English proper nouns",
    "English uncountable nouns",
    "en:Geometry"
  ],
  "forms": [
    {
      "form": "the midpoint theorem",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1"
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      "expansion": "the midpoint theorem",
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "glosses": [
        "A theorem stating that if the midpoints of two sides of a triangle are connected, the resulting line segment will be parallel to the third side and have half of its length."
      ],
      "links": [
        [
          "triangle",
          "triangle"
        ],
        [
          "parallel",
          "parallel"
        ]
      ],
      "synonyms": [
        {
          "word": "midline theorem"
        }
      ]
    },
    {
      "glosses": [
        "A theorem stating that the midpoints of parallel chords in a conic are located on a common line."
      ],
      "links": [
        [
          "chord",
          "chord"
        ],
        [
          "conic",
          "conic"
        ]
      ]
    }
  ],
  "word": "midpoint theorem"
}