obtuse angle
(can be used vice versa)perpendicular:when anglecomplementary
obtuse-angle-of-a-rhombus
来场数学几何的英文freestyle尬聊
图片内容是:obtuseangle
obtuse angle range adjustable square assembly
what is an obtuse angle? - definition & examples
isosceles, angle of 40 degrees, obtuse angle
obtuse-angle-of-a-triangle
钝角三角形(obtuse triangle)就是指三角形的最大角为钝角的三角形.