A.) A straight angle is an angle that makes a 180° angle, which is wrong.
B.) A complementary pair is two angles who's sum is 90°. Since in the picture, there is a 90° (you can tell by the little square in it's angle) split in two, it is complementary.
C.) Vertical angles are two angles made opposite by two intersecting lines.
D.) Supplementary angles (2) make a total of 180° when they are added together.
When will they blink together? what is the smallest number they both mutiply to 3*5=15 so every 15 seconds so at 15, 30, 45, 60 seconds so 4 times if you count the time exactly at 1 minute
