Question

Find the radius of the circle passing through the point (-6,8) centered at the origin.

• A. 8 units
• B. 9 units
• C. 10 units
• D. 12 units

Answer 1

The correct option is C 10 units

Since it is centred at the origin and passes through (-6,8), the radius will be the distance of (-6, 8) from the origin.
=> radius = <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\sqrt{\left(\right(-6{)}^2+(8{)}^2}$ = <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\sqrt{36+64}$ = <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\sqrt{100}$ units = 10 units