SOLUTION: two angles of a triangle is the same size. the third angle is 12 degrees smaller than the first angle. find the measure the angle
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Question 707133: two angles of a triangle is the same size. the third angle is 12 degrees smaller than the first angle. find the measure the angle
Answer by Stitch(470) (Show Source): You can put this solution on YOUR website!
The sum of the angles of a triangle equal 180
Equation 1:
Equation 2:
Equation 3:
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Note that equations 2 and 3 are written in terms of A. You can substitute the values of B & C into equation 1.
Equation 1:
Combine like terms
Add 12 to both sides
Divide both sides by 3
------------------------------
Now plug 64 into equation 2 for A
Equation 2:
------------------------------
Now plug 64 into equation 3 for A
Equation 3:
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