x Turn on thread page Beta
 You are Here: Home >< Maths

# Work with Circles watch

1. Hi I really need help with the three questions. Please, let me know if the solutions I have done are correct or not.
Attached Images

2. (Original post by strangepath)
Hi I really need help with the three questions. Please, let me know if the solutions I have done are correct or not.
I can't really remember the circle theorems, but the last one is right and I'm pretty sure the first one is too. though you haven't finished the last question . . .
3. (Original post by joostan)
I can't really remember the circle theorems, but the last two are right and I'm pretty sure the first one is too. though you haven't finished the last question . . .
I am only half done with the questions and needed help with the rest of them. I would be really glad if someone helped me solve it.
4. First one is not complete
Second one is wrong ... and your labelling is awful what is <D meant to be as there are 3 angles at D ... CDB=79 would be correct but of no use to you

The part of (3) that you have done is correct
5. (Original post by TenOfThem)
First one is not complete
Second one is wrong ... and your labelling is awful what is <D meant to be as there are 3 angles at D ... CDB=79 would be correct but of no use to you

The part of (3) that you have done is correct
Could you help me complete it, please? I need to hand it in 2 hours. Please
6. (Original post by strangepath)
Could you help me complete it, please? I need to hand it in 2 hours. Please
(1) is almost done you just have not answered the question ... I assume that you know the total degrees around a point

(2) Use a triangle to write down the value of ACB, then write down the value of ADB using one of the rules

(3) If you know CDB then you know CAB (same rule that you need to know in 2)
7. *Reflex angle is greater than 180

Agree with TenOfThem in that the lablelling is awful. I do, however, think the angle CDB=79 is relevant in finding ADB.
8. (Original post by Matt San)
I do, however, think the angle CDB=79 is relevant in finding ADB.
You must be taking a different approach to my suggested one
9. (Original post by TenOfThem)
You must be taking a different approach to my suggested one
For Q1 the answer is 290 deg and
for Q3 the answer is 40 def

am I correct?

i really don't know how I should find q2.
10. TOT,

Oh yeah, see where you're coming from. I was using ABC (since this was already given) and CDB (as this was obtained already by thread starter).

cheers
11. (Original post by strangepath)
For Q1 the answer is 290 deg and
for Q3 the answer is 40 def

am I correct?

i really don't know how I should find q2.
You can find ACB from properties of a triangle. Other than opposite angles being 180, what other properties are special to a cyclic quad? Or, the other circle theorum is Angles extended on the circumference from the same sector are "........."
12. (Original post by strangepath)
For Q1 the answer is 290 deg and
for Q3 the answer is 40 def

am I correct?

i really don't know how I should find q2.
yes

have you done as I said
13. (Original post by Matt San)
TOT,

Oh yeah, see where you're coming from. I was using ABC (since this was already given) and CDB (as this was obtained already by thread starter).

cheers
Ah

I see the direction that you were going ... equally valid
14. (Original post by TenOfThem)
yes

have you done as I said
Is the answer 28 deg ( angles in same segment)?
15. (Original post by strangepath)
Is the answer 28 deg ( angles in same segment)?
Yes
16. (Original post by TenOfThem)
Yes
COOL thank you all so much

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: April 12, 2013
Today on TSR

### Any tips for freshers...

who are introverts?

### More snow?!

Discussions on TSR

• Latest
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE