Elvis Presley was born in Mississippi and has an estimated net worth of $300 million. A singer and musician, Elvis popularized rock and roll in the 50's. Known for his wild performance style, good looks, and musicianship (largely influenced by African-American rhythm and blues), Elvis took the world by storm.
Right Triangle Similarity Acute Angle Similarity If one of the acute angles of a right triangle is congruent to an acute angle of another right triangle, then by Angle-Angle Similarity the triangles are similar. In the figure, â  M â â  Y , since both are right angles, and â  N â â  Z .
Suppose that you had a right angle triangle. Note that if you take it and another copy of it (moved around a bit) the two triangles together can be placed to make a rectangle. This rectangle has four 90 degree angles adding up to 360 degrees. Since the triangles are congruent each triangle has half as many degrees, namely 180. So this is true for any right triangle. Suppose you triangle is not a right triangle. Draw a perpendicular from the vertex opposite the longest side, to the longest side. What you have now is two right triangles which, by the above contain 360 degrees in total. But if you look at the two right angles that add up to 180 degrees so the other angles, the angles of the original triangle, add up to 360 - 180 = 180 degrees.