Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

alt text

Sorry if this is a little basic, but my math is pretty rusty. I know the point coordinates of the two blue dots. I also know the distances from the middle blue dot to the edges of the square. How can I calculate the coordinates of the red dot?

share|improve this question
add comment

1 Answer 1

up vote 1 down vote accepted

The two right angled triangles in the picture are similar. Hence the ratio of the corresponding sides are the same. You can use this to get the remaining coordinates.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.