# CBSE Class 10-Mathematics: Chapter –7 Coordinate Geometry Part 21

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**Question 11:**

are the vertices of a is the mid-point of BC and P is a point on AD joined such that find the coordinates of P.

**Answer:**

Let are the vertices of is the mid-point of BC

Coordinate of

i.e.,

Coordinate of P are

**Question 12:**

The coordinates of the vertices of are . Given that the area of **i**s 12, find the value of K.

**Answer:**

But area of

If

Value of

**Question 13:**

Find the lengths of the medians of the triangle whose vertices are

**Answer:**

Coordinates of points D, E and F are

i.e.

Length of the median AD

Length of the median BE

And length of the median CF