Mathematics
Medium
Question
The angles of a triangle are (x-35), (x-25) and (1/2x-10). find x.
(A) 80
(B) 90
(C) 100
(D) None of these
A
80
B
90
C
100
✓ Official correct answer
D
None of these
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A
80
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B
90
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C
100
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D
None of these
No member explanations yet for this option.
Explanation
Solution
Sum of angle of a triangle = 180
x-35 + x-25 + x/2 - 10 = 180
x + x + x/2 - 35 - 25 - 10 = 180
2x + x/2 - 70 = 180
5x/2 = 180 + 70
5x/2 = 250 -> 5x = 500 -> x = 100
Sum of angle of a triangle = 180
x-35 + x-25 + x/2 - 10 = 180
x + x + x/2 - 35 - 25 - 10 = 180
2x + x/2 - 70 = 180
5x/2 = 180 + 70
5x/2 = 250 -> 5x = 500 -> x = 100