Mathematics

Find the values of the unknown x and y in the following diagram.


SOLUTION
By using external angle property
$$x+ 50^o = 120^o$$
$$\therefore x = 70^o$$
Sum of all angles of a $$\Delta le$$ is $$180^o$$
$$50^o + x + y = 180^o$$
$$50^o + 70^o + y = 180^o$$
$$\therefore y = 60^o$$

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