共50条信息
如图。\(AD\)、\(CE\)是\(\triangle ABC\)的中线,\(G\)是\(\triangle ABC\)的重心,且\(AD⊥CE.\)若\(AD=3\sqrt{3}\),\(CE=6\),则\(AB=\)________.
如图,\(\angle BAC={{80}^{0}}\)点\(O\)在三角形内部,当点\(O\)为三角形三边垂直平分线的交点时,\(\angle BOC=\)_____\(;\)当点\(O\)为三条角平分线的交点时,\(\angle BOC=\)_____;当点\(O\)为三条高线的交点时,\(\angle BOC=\)_____\(.\)
如图,\(\triangle ABC\)的两条中线\(BE\)、\(CD\)交于点\(O\),连\(AO\)
\((1)\)在\(OA\)上取点\(F\),当点\(F\)满足什么条件时,四边形\(ODFE\)为平行四边形,并证明。
\((2)\)求\( \dfrac{OE}{OB}\)的值。
已知直角三角形的两条直角边的长分别为\(6cm\),\(8cm\),则此直角三角形的重心与外心之间的距离是_________.
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