tri 13-when shown a triangle with three components indicated by congruence marks, student will accurately "name" the relationship among congruent elements as aaa, aas, asa, saa, ass, sas, ssa, or sss We know that two triangles are congruent iff all corresponding angles and all corresponding sides are congruent, but what if there is a shorter ... There are also special cases of right triangles, such as the 30° 60° 90, 45° 45° 90°, and 3 4 5 right triangles that facilitate calculations. Where a and b are two sides of a triangle, and c is the hypotenuse, the Pythagorean theorem can be written as: a 2 + b 2 = c 2 EX: Given a = 3, c = 5, find b: 3 2 + b 2 = 5 2 9 + b 2 = 25 b 2 = 16 ...

It consists of two expressions, one on each side of an 'equal' symbol (e.g., 5 + 3 = 8, 8 = 5 + 3 and 4 + 3 = 9 - 2). Equations may be written with sums and differences at the beginning of the equation (e.g., 8 = 5 + 3).

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