In this page 10th analytical geometry worksheets, you can find lots of worksheets for 10th grade.

Area of triangle:

To find area of any triangle
with three vertices first we have to draw the picture by using the
given points.

All areas are positive. So area of triangle must be
positive so the points (x₁,y₁) (x₂,y₂) and (x₃,y₃) taken in order should
be in the counter clockwise direction.

If the given points are taken in
the order are in clockwise the the area will be in negative number.

If two straight lines are not parallel,then they will meet at a
point.This common point for both,straight lines is called the point of
intersection.If the equations of two intersecting straight lines are
given,then their intersecting point is obtained by solving equations
simultaneously.

It
can be shown that the altitudes of a triangle are concurrent and the
point of concurrence is called the orthocentre of the triangle.The
orthocentre is denoted by O.