You are Here: Home >< GCSEs

# Circle Theorems Question Help watch

1. http://prntscr.com/ave7zl

need help with this can someone explain how to do this. Thanks
2. (Original post by junayd1998)
http://prntscr.com/ave7zl

need help with this can someone explain how to do this. Thanks
What can you say about osr and ors
3. (Original post by samb1234)
What can you say about osr and ors
You could say OSR is 90-X
4. remember that the angles in a triangle always add up to a certain number....
5. (Original post by junayd1998)
You could say OSR is 90-X
Indeed, and what about ors (what can you say about the distances OR and OS?)
6. (Original post by samb1234)
Indeed, and what about ors (what can you say about the distances OR and OS?)
That it is an isoslies triangle because they are equal length OR and OS???
7. (Original post by junayd1998)
That it is an isoslies triangle because they are equal length OR and OS???
Yes
8. (Original post by junayd1998)
That it is an isoslies triangle because they are equal length OR and OS???
Yes.
9. (Original post by Zacken)
Yes.
So if we know OR and OS are equal and ROS is 2X Then 180-2x then divide by 2?
Im not sure tbh
10. (Original post by junayd1998)
So if we know OR and OS are equal and ROS is 2X Then 180-2x then divide by 2?
Im not sure tbh
What? You know that the triangle is isoceles, so ORS and SRO are both 90-x. And you also know that angles in a triangle add up to 180.

So ROS + 90 - x + 90 - x = 180. What's ROS, then?
11. (Original post by Zacken)
What? You know that the triangle is isoceles, so ORS and SRO are both 90-x. And you also know that angles in a triangle add up to 180.

So ROS + 90 - x + 90 - x = 180. What's ROS, then?
I am nearly there. Give me 10
Minutes
12. (Original post by Zacken)
What? You know that the triangle is isoceles, so ORS and SRO are both 90-x. And you also know that angles in a triangle add up to 180.

So ROS + 90 - x + 90 - x = 180. What's ROS, then?
2x.
13. (Original post by junayd1998)
2x.
Ta-da.

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 22, 2016
Today on TSR

### The most controversial member on TSR?

Who do you think it is...

### Is confrontation required?

Discussions on TSR

• Latest
Poll
Useful resources

## Study tools

### Essay expert

Learn to write like a pro with our ultimate essay guide.

See where you can apply with our uni match tool

### Make study resources

Create all the resources you need to get the grades.

### Create your own Study Plan

Organise all your homework and exams so you never miss another deadline.

### Resources by subject

From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

### Find past papers

100s of GCSE past papers for all your subjects at your fingertips.

## 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