Question

Construct the tangents to a circle from a point outside it, where O is centre of the circle
and a point A outside it.​

Answer 1

A precipitation reaction refers to the formation of an insoluble salt when two solutions containing soluble salts are combined. The insoluble salt that falls out of solution is known as the precipitate, hence the reaction's name. Precipitation reactions can help determine the presence of various ions in solution.

Answer 2

Step-by-step explanation:

GIVEN:A circle with centre O and a point P on it.

TO CONSTRUCT:the tangent to the circle at the point P.

STEPS OF CONSTRUCTION:

(i) Join OP.

(ii) Draw a line segment AB ⊥ OP at the point P. APB is the required tangent at P.

STEPS OF CONSTRUCTION:

(i) Draw any chord PQ and join P and Q to a point R.

(ii) Draw ∠QPA equal to ∠PRQ on opposite side of chord PQ.

The line segment BPA is the tangent to the circle at P.