Question

Someone please help me on this. Please help me. Please don’t put a link.

Answer 1

Given:

The figure of a triangle LMN.

P is the centroid of triangle LMN.

To find:

14. Find the value of PN if QN=30.

15. Find the value of PN if QN=9.

Solution:

We know that the centroid in the intersection of medians of a triangle and centroid divides each median in 2:1.

Since P is the centroid it means NQ is the median from vertex N. It means P divides the median NQ in 2:1. So, PN:PQ=2:1.

14. We have QN=30.

`PN=(2)/(2+1)QN`

`PN=(2)/(3)(30)`

`PN=2(10)`

`PN=20`

Therefore, the value of PN is 20 when QN=30.

15. We have QN=9.

`PN=(2)/(2+1)QN`

`PN=(2)/(3)(9)`

`PN=2(3)`

`PN=6`

Therefore, the value of PN is 6 when QN=9.