Question
If one angle of a triangle is equal to the sum of the other two angles which are equal, then the triangle is a/an _________ .
Answer: Option C
:
C
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C
Let the two equal angles be x.
Then the third angle y = 2x
Also we know,
y + 2x = 180° (Sum of the angles of a triangle is 180°)
2x + 2x = 180°
4x = 180°
x = 45°
Hence the two equal angles are 45° each and the other angle is 90° which makes this triangle a right angled triangle.
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