mathematics 3H Question 18.

[mahmoud631]

here is the question we are searching for try to solve xD

 

[mahmoud631]

I don't think its 23

 

[adi19956]

it is 23 degrees. you use the two isosceles triangles that are formed by the two lines being the same and the radii. You then work out as many angles as you can in terms of x then form an equation around it for the angle next to 69 degrees (the given one)

 

[Brain Box]

it is 23 degrees. you use the two isosceles triangles that are formed by the two lines being the same and the radii. You then work out as many angles as you can in terms of x then form an equation around it for the angle next to 69 degrees (the given one)View attachment 9409

this question was in the paper i wrote recently (dont know if i had it right)

 

[alex]

its 23
i took that exam too

 

[Weirdal95]

it's 34.5, 9 people whos predicted grades where A* in my year level got that too.

 

[alex]

it's 34.5, 9 people whos predicted grades where A* in my year level got that too.

they used the alternate segment theorem which is incorrect.
My teacher told me the correct answer is 23.

 

[adi19956]

it's 34.5, 9 people whos predicted grades where A* in my year level got that too.

Most people in my school are predicted A*s yet answers for this were all over the place, however, the top guys all got 23 degrees including the Chinese guy who almost definitely got 100% who gives his name to the picture above.

It cannot be 34.5 because there are no segments to follow alt. seg. with. the only way this can be worked out is with an equation and if you follow what I said above, you cannot dispute that