Question

Please help, tangents of circles

Answer 1

Answer:

Step-by-step explanation:

If a line is tangent to a circle, it is perpendicular to the radius drawn to the point of tangency. Tangent segments to a circle from the same external point are congruent. ... The triangles have right angles at A and C since a radius drawn to the point of tangency is perpendicular to the tangent.

Answer 2

<CDB=48

As We know Any chord subtend double angle to any point on circumference

So, <COB = 2×48= 96

As AC and AB are tangents and OC ,OB are normals

In COBA

<COB + <OCA+ <OBA +<A =360

AS OCA =OBA =90

SO, 96 +90+90+<A =360

276 + <A= 360

<A =360-276 = 84