Question

Prove that radius passes through centre of the circle.
10+10 points for correct answer.
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Answer 1

Answer:

Let, O is the centre of the given circle. A tangent PR has been drawn touching the circle at point P. Draw QP ⊥ RP at point P, such that point Q lies on the circle. ... Hence, perpendicular at the point of contact to the tangent to a circle passes through the centre of the circle.

Answer 2

Answer:

10 cm

Step-by-step explanation:

Length of the rope is 20 m and angle made by the rope with the ground level is 30°.

Given: AC = 20 m and angle C = 30°

To Find: Height of the pole

Let AB be the vertical pole

In right ΔABC, using sine formula

sin 30° = AB/AC

Using value of sin 30 degrees is ½, we have

1/2 = AB/20

AB = 20/2

AB = 10