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Question 142
The angles of a triangle are $$2x-3, x+12, x-1$$. The largest angle of the triangle is:
Solution
We know sum of all angles of a triangle is 180°.
So,$$(2x-3)+(x+12)+(x-1)=180.$$
or,$$4x+8=180$$
or,$$x=172\div 4=43.$$
So, largest angle$$=2×43-3=83.$$
D is correct choice.
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