Question

the diameter of circle with Centre O is 8 cm if A point on the circle then OA is equal to______
a)16cm b)8cm c)4cm d)6cm
pls cross this hurdle....​

Answer 1

Step-by-step explanation:

∵OB=OC=radius=r

Join OA which is radius i.e OA=r

OD⊥AB in isosceles triangle AO and so divide

AB

into two square sides

AD

and $$\overline{BD}$$

By applying mid point theorem in △ABC,

⇒OD∥AC

⇒

OD

=

2

1

AC

⇒

AC

=2

OD

the answer is 2

Answer 2

Given:

The diameter of circle with Centre O is 8 and A is a point on the circle.

Solution:

Know that the radius of circle is half of the diameter.

Draw the required diagram,

$\[\begin{array}{c}OA = \frac{8}{2}\\ = 4{\rm{ cm}}\end{array}\]$

Hence, the correct answer is option (c) i.e. 4 cm.