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What do you observe? Clearly, the points P, Q and. Clearly, the points P, Q and R are given by 12, 2 , 13, 6 and 10, 3 respectively. Find the coordinates of the point D. Note: The point which is common to all the three medians is called centroid and this point divides each median in the ratio 2: 1. D is the mid-point of BC. E is the mid-point of AD. F is the mid-point of AB. This point is known as the centroid of the triangle. Coordinates of D are. The coordinates of E are. The coordinates of a point dividing BE in the ratio 2: 1 are.
Similarly, the coordinates of a point dividing CF in the ratio 2: 1 are. The median of a triangle are concurrent and the coordinates of the centroid are. Find the centre of a circle passing through the points. The distance between the two points can be measured using the Distance Formula which is given by:. The centre of the circle passing through the points. The class X students of a secondary school in Krishinagar have been allotted a rectangular plot of land for their gardening activity.
There is a triangular grassy lawn in the plot as shown in the following figure. The students are to sow seeds of flowering plants on the remaining area of the plot. Also Ncert Solutions Class 10th Exercise 7.4 Standard calculate the areas of the triangles in these cases. What do you observe? It can be observed that the area of the triangle is same in both the cases. Recall Converse of basic proportionality theorem and Theorem 6. Converse of Basic Proportionality Theorem: If a line divides any two sides of a triangle in the same ratio, then the line must be parallel to the third side.
Alternatively, we know that if a line segment in a triangle divides its two sides in the same ratio, then the line segment is parallel to the third side of the triangle[Converse of Basic Proportionality Theorem].
Hence, the ratio between the areas of these two triangles will be the square of the ratio between the sides of these two triangles. A median of a triangle is a line segment joining the vertex to the midpoint of the opposite side, thus bisecting that side. Every triangle has exactly three medians, one from each vertex, and they all intersect each other at the triangle's centroid.
Therefore, all these are representing the same point on the plane i.
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