Q13:
Is the measure of one of the interior angles of quadrilateral ABCD equal to 60 degrees?
(1) Two of the interior angles of ABCD are right angles.
(2) The degree measure of angle ABC is twice the degree measure of angle BCD.
解答是寫E
這是不是問說四邊形是不是有一內角等於60度?
第一個選項說有兩個內角為直角,那另兩個內角也應是直角,就應該沒有內角為60度,那A不就是對了嗎?
麻煩各位幫小弟解答一番,好久沒做數學了