Practicing Success
Angle subtended by a chord AB on the circumference of a circle is 90 degree. If length of chord AB is 16 cm, then what will be radius of this circle ? |
8 cm 9 cm 12 cm 10 cm |
8 cm |
Let o be the circle's centre and let C is the point on the circumference, Using if angle subtended by a chord on the circumference of a circle is \({90}^\circ\), then the chord is the circle's diameter. So, AB is the diameter. The radius is half of the diameter. AB = 2(OA) = 2(OB) ⇒ (OA) = (OB) = \(\frac{AB}{2}\) = \(\frac{16}{2}\) ⇒ 8 cm. |