Which of these conditions might be true if polygons abcd and klmn are similar? a. the measures of corresponding angles of abcd and klmn are equal, but the lengths of corresponding sides of abcd are half those of klmn. b. the measures of corresponding angles of abcd and klmn are in the ratio 1 : 2, but the lengths of corresponding sides of abcd and klmn are not proportional. c. the lengths of corresponding sides of abcd and klmn are equal, but the measures of corresponding angles of abcd and klmn are not equal. d. the lengths of corresponding sides of abcd and klmn are proportional, but the measures of corresponding angles of abcd and klmn are not equal. e. the measures of corresponding angles of abcd and klmn are not proportional, but the lengths of corresponding sides of abcd and klmn are proportional.