## Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.

## Question

secondary 3 | E Maths
3 Answers Below

Anyone can contribute an answer, even non-tutors.

##### XP

chevron_right chevron_right

Isit length of (D+E)/2=F? But coordinates how?

Date Posted: 11 months ago
Views: 53
Charles
11 months ago
Yes. (X-coord of D+X-coord of E)/2 = X-coord of F
Do the same for the y-coord.

### See 3 Answers

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
##### Sam Sum's answer
17 answers (Tutor Details)
1st
Date Posted: 11 months ago
done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
##### Eric Nicholas K's answer
3994 answers (Tutor Details)
We equate the two lengths using the length formula for straight lines connecting two points. Since both sides are equal, the square roots can be removed.

A special case is only when D, E and F are all on the same straight line, in which we can use the simpler midpoint formula instead.
Date Posted: 11 months ago
XP
11 months ago
Oh, I see. Thanks!
done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
##### Chua Tze Ren's answer
15 answers (Tutor Details)
For this question, you can't just divide the X and y coordinates of D and E by 2 because the question did not state that F is the midpoint of DE.
Date Posted: 11 months ago
XP
11 months ago
Thanks so much! It's a very clear step-by-step working!