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    • 2. 发明申请
    • EDUCATIONAL RULER
    • 教育统治者
    • US20160025476A1
    • 2016-01-28
    • US14775697
    • 2013-11-12
    • Haoyu XINGZhi SHANG
    • Zhi SHANG
    • G01B3/56B43L7/10
    • G01B3/563B43L7/005B43L7/027B43L7/10B43L9/002B43L9/005B43L13/002B43L13/205G09B23/04
    • An educational ruler is a protractor, where the protractor can draw and measure angles. The educational ruler includes a planar disk having a semicircular circumference and labeled in scales along the semicircular circumference; a straight line edge connecting two edges of the semicircular circumference; a through hole on the planar disk; a first edge and a second edge extending from the through hole to the straight line edge; a third edge and a fourth edge extending from the semicircular circumference to the straight line edge. The first edge of the through hole of the educational ruler and the second edge of the through hole of the educational ruler intersect at 90 degrees scale of the planar disk to form the first right angle, and the included angle of the first edge of the through hole of the educational ruler and the straight line edge of the educational ruler is 45 degrees.
    • 教育统治者是量角器,量角器可以绘制和测量角度。 教育尺包括具有半圆周的平面圆盘,并沿着半圆周标出标尺; 连接半圆周的两个边缘的直线边缘; 平面盘上的通孔; 从所述通孔延伸到所述直线边缘的第一边缘和第二边缘; 从半圆周延伸到直线边缘的第三边缘和第四边缘。 教育尺的通孔的第一边缘和教育尺的通孔的第二边缘与平面盘的90度刻度相交以形成第一直角,并且通孔的第一边缘的夹角 教育统治者的洞和教育统治者的直线边缘是45度。