rectangular triangleright angle triangleright angled triangleright triangleright-angle trianglerightangled triangle等腰直角三角形: isosceles righttriangle球面直角三角形: right angle spherical triangle; roghtangled spherical triangle直角三角形的侧边: leg of a right triangle直角三角形的股: arm; lag直角三角形相图: right angle triangular diagram下载手机词典可随时随地查词查翻译