jaden2005 jaden2005

07-02-2019
Mathematics

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Professor1994 Professor1994

07-02-2019

Answer:

(b) the unknown angle is 80°

Step-by-step explanation:

The unkown angle is:

[2(x-10)]°

Substituting "x" by 50 (part a)

[2(50-10)]°=[2(40)]°=80°

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