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1.right-angled triangle
2.function of an angle expressed as a ratio of the sides of right-angled triangle containing the angle.
直角三角形各角的函数是用各边的比来表示的。收藏指正
3.One of the small sides of a right-angled triangle is 5cm and the perpendicular height drawn against the hypotenuse is 3cm.
(一直角三角形的小边中的一5厘米和垂直高度反对斜边是3厘米拉。收藏指正
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