Thursday, March 6, 2014

DEGREES B1

Find the value of a in the following figure.



solution

3a + a + 72 + 1080 = 3600

4a + 1800 = 360[collecting like terms]

4a = 3600 - 1800

4a = 1800

4a = 1800       [dividing by 4 on both sides]
4        4


a = 450

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