Question

If the length of a chord $AB$ is equal to the radius $OA$ of the circle, then $\angle ABO$ equals ($O$ is the center)

• A. $120$
• B. $60$
• C. $45$
• D. $30$

Answer 1

Answer: (B)

$60$

$OA=OB$ (Radius of the circle)

Since $OA=AB,$

$OB=AB$

Therefore all sides are equal.

Hence, it is equilateral triangle or the angles measure $60$ each.