Which of the following triangles have their one side as an altitude?
A
Acute angled triangle
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B
Obtuse angled triangle
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C
Right angled triangle
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D
Equilateral triangle
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Solution
The correct option is C Right angled triangle Suppose, ΔABC is a right angled triangle. We can see that two sides BC and AC are perpendicular to each other.
An altitude is a perpendicular line drawn from the vertex to the opposite side of the triangle.
∴ Here, side BC is also an altitude from B to the side AC and also side AC is an altitude from A to side BC.