SOLUTION: The second angle of a triangle is 30(degrees)less than the first angle.The third angle is twice the second angle. How large are the angles? This problem i really struggled on becau
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Question 241215: The second angle of a triangle is 30(degrees)less than the first angle.The third angle is twice the second angle. How large are the angles? This problem i really struggled on because i dont know how to write it out and solve it.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
The second angle of a triangle is 30(degrees)less than the first angle.The third angle is twice the second angle. How large are the angles? This problem i really struggled on because i dont know how to write it out and solve it.
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The 1st angle is d degrees
The 2nd angle is d - 30
The 3rd angle is 2*(d-30)
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The sum is (always) 180º
d + d-30 + 2(d-30) = 180
4d - 90 = 180
4d = 270
d = 67.5º
2nd angle = 37.5º
3rd angle = 75º
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