# CBSE Class 10-Mathematics: Chapter –7 Coordinate Geometry Part 23

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**Question 17:**

Find the coordinates of the points which divides the line segment joining and into four equal parts.

**Answer:**

and

Let and are the points which divide line segment AB into equal parts.

Let coordinates of point and

We know .

It means, point P divides line segment AB in .

Using Section formula to find coordinates of point P, we get

Since .

It means, point Q is the mid-point of AB.

Using Section formula to find coordinates of point Q, we get

Because .

It means, point R divides line segment AB in

Using Section formula to find coordinates of point P, we get

Therefore,

**Question 18:**

The two opposite vertices of a square are Find the coordinates of the other two vertices.

**Answer:**

Let ABCD be a square and be the unknown vertex.

AB = BC

In

Putting the value of in eq. (ii),