In the given figure,
a chord BC of length 5 cm is the longest chord possible. if A is a point on the segment as shown, what kind of a triangle is △ABC?
The longest chord of the circle is the diameter of the circle.
∴ BAC is a semi-circle.
We know, angle in a semi-circle is a right angle.
∴ ∠A = 90∘.
Hence, △ABC is a right angled triangle.