You are Here: Home >< Maths

# GCSE maths circle theorem watch

1. Attachment 698296Can someone help me on how angle BDC is 29?
2. (Original post by Chocolate...s)
Attachment 698296Can someone help me on how angle BDC is 29?
Angle ACD = 90 + 61 = 151 (From what you've already labelled on the diagram)

BD and AC are parallel (From what you've labelled)

So angle BDC = 180 - 151 = 29 (because co-interior angle add up to 180 degrees)
3. (Original post by Loci Pi)
Angle ACD = 90 + 61 = 151 (From what you've already labelled on the diagram)

BD and AC are parallel (From what you've labelled)

So angle BDC = 180 - 151 = 29 (because co-interior angle add up to 180 degrees)
Thank u but where does 61 also come from if you didnt know what the angle BDC is.
And this is not my worksheet, it is corbettmaths circle theorem worksheet answers
4. Anyone??

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: October 25, 2017
Today on TSR

### University open days

Wed, 21 Nov '18
• Buckinghamshire New University
Wed, 21 Nov '18
• Heriot-Watt University
Wed, 21 Nov '18
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