The sum of the three angles of every triangle always equals 180Â° . A right triangle always has one angle equal to 90Â° and two angles whose sum is 90Â° , making a total of 180Â° . A rectangle is a four sided shape. with four right angles (90Â° ).
boast 1. v. boastÂ·ed, boastÂ·ing, boasts. v. intr. To talk or write about oneself or something related to oneself in a proud or self-admiring way. v. tr.
uk â /ËbÉÊl.stÉr/ us â /ËboÊl.stÉ/. âº to support or improve something or make it stronger: More money is needed to bolster the industry. She tried to bolster my confidence/morale (= encourage me and make me feel stronger) by telling me that I had a special talent. They need to do something to bolster their image.