2. In the following diagram. AB is a tangent to the circle, centre O and OCB-25 (a) Calculate OBC b) АОВ (c)OAB (B) If the radius 5 cmuse trigonometry to calculate AB and BC​

the correct answer is the second option

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have