Q31
Two intersecting lines form four angles. Are the lines perpendicular?
(1) Each of the angles is equal to exactly one of the other three angles.
(2) The sum of three angles does NOT equal to 270 degrees.
答案是D
可是我選B 請問 (1)能夠解釋是否為直角嗎
機考的題目不知道怎麼定標題><