(pos:名詞)
<explanation>
yue:九十度角（量詞：個）
eng:right angle
<eg>
yue:直角三角形 (zik6 gok3 saam1 gok3 jing4)
eng:right-angled triangle
<eg>
yue:長方形嘅四個內角就係直角。 (coeng4 fong1 jing4 ge3 sei3 go3 noi6 gok3 zau6 hai6 zik6 gok3.)
eng:The four interior angles of a rectangle are right angles.
