1. sometimes true = acute angles are less than 90° so sometimes it can equal greater or less than 90°2. never true = search supplementary online and click on the images3. always true4. never true = a complementary angle are two angles that equals to 90° (63° & 27°)5. always true6. always true7. sometimes true?8. always true = pairs will always be together9. always true10. always true = adjacent means near with each other and if you look at some examples of it online, they're always together