B, C and D are points on a circle, centre O. AB and AD are tangents to the circle.
Angle BCD = xº
B
Find an expression for the size of angle BAD in terms of x.
Give your answer in its simplest form.
Give reasons for each stage of your working.

the answer is a

step-by-step explanation:

7,24

step-by-step explanation:

answer

you start with $5 and save $10 a week until you have at least $45wer

step-by-step explanation:

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4