11. For example, the sum of the interior angles of any triangle is always greater than 180? 12. A 150 degree angle has an interior angle of 150 and an exterior angle of 30. 13. One interior angle in a regular triacontagon is 168? meaning that one exterior angle would be 12? 14. The two interior angles of a kite that are on opposite sides of the symmetry axis are equal. 15. The interior angle of T * at p'is called the "'comparison angle "'between q and r at p. 16. The third, fourth and fifth are short and the sixth and seventh extending nearly to the interior angle . 17. The hindwings are metallic-purple at the tips and a metallic-purple patch on each side of the interior angle . 18. For example, no matter how a triangle is transformed, the sum of its interior angles is always 180? 19. If the straws had been straight, then the above-mentioned angle would be exactly the interior angle of a pentagon. 20. The hindwings are white, semihyaline and iridescent, with a brown border, which does not extend to the interior angle .