You are Here: Home >< Maths

# Which is the correct answer? (Maths) watch

2. (Original post by randomuser5678)
D
the triangles are similar shapes
3. (Original post by IDOZ)
D
the triangles are similar shapes
Thankyou
4. (Original post by randomuser5678)
Thankyou
Measure angles BAC and CED
if they are the same, then it is D
if not, then it is A
5. If you examine the triangles and the length DE and AB you'll notice they're similar, by a scale factor of 2, so you can get your value of AC by doubling your value of CE, which is 12cm.
6. How would i work it out?
7. (Original post by randomuser5678)
How would i work it out?
A highest common factor means that the number stated in the question (15) is the greatest possible number that goes into the ones you are looking at. For example, the greatest common factor of 12 and 16 is 4, because any number higher than 4 will not fit into both numbers.

Spoiler:
Show
C since the HCF of 30 and 60 is 30

### Related university courses

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: February 19, 2018
Today on TSR

### He lied about his age

Thought he was 19... really he's 14

### University open days

Wed, 25 Jul '18
2. University of Buckingham
Wed, 25 Jul '18
3. Bournemouth University
Wed, 1 Aug '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