To find the measure of the third angle you should keep in mind the following: The sum of the three interior angles of a triangle is 180 °. We have then k + 27 + 10 = 180 Clearing k: k = 180-27-10 = 143 K = 143 ° Answer: the value of k is 143 °
The process of expressing w in terms of A and l is called transposition or changing the subject of the formula. The methods used to change the subject of the formula are the same as those used for solving equations.
