## Answer in 60

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## Related querie

### What is meant by cevians?

Definition of cevian

: **a straight line drawn through a vertex of a triangle or of a tetrahedron and intersecting the opposite side or face**.

### How do you prove Apollonius theorem?

In geometry, Apollonius's theorem is a theorem relating the length of a median of a triangle to the lengths of its sides. It states that "**the sum of the squares of any two sides of any triangle equals twice the square on half the third side, together with twice the square on the median bisecting the third side**".

### Why is Cevas theorem important?

It regards the ratio of the side lengths of a triangle divided by cevians. Menelaus's theorem uses a very similar structure. Both theorems are very useful in Olympiad geometry. Ceva's theorem is **useful in proving the concurrence of cevians in triangles** and is widely used in Olympiad geometry.

### What is the center of mass of a triangle?

**Median is the line drawn from the midpoint of one the sides of the triangle to the opposite vertex**. This point is the centre of mass of the triangle.

### Is the converse of Cevas theorem true?

Here CE, BG, and AF Cevians are concurrent. **It holds true when H and G illustrate the same point**.

### What does Menelaus theorem prove?

Menelaus' theorem relates ratios obtained by a line cutting the sides of a triangle. The converse of the theorem (i.e. three points on a triangle are collinear if and only if they satisfy certain criteria) is also true and is extremely powerful in proving that **three points are collinear**.

### What is the objective of Menelaus theorem?

Menelaus' theorem **deals with the collinearity of points on each of the three sides (extended when necessary) of a triangle**. Calculation: Consider Î”ABC, Then D, E and F are, respectively, points on the side CA, AB and BC, and by construction are collinear.

### What is centroid of a triangle?

The centroid is the centre point of the object. **The point in which the three medians of the triangle intersect** is known as the centroid of a triangle. It is also defined as the point of intersection of all the three medians. The median is a line that joins the midpoint of a side and the opposite vertex of the triangle.

### Why do we use Apollonius theorem?

Apollonius Theorem **provides us a way of calculating median lengths in triangles, if we know their sides**. This helps us solve the triangle.

### What does Cevas theorem prove?

Ceva's theorem is a theorem of affine geometry, in the sense that **it may be stated and proved without using the concepts of angles, areas, and lengths** (except for the ratio of the lengths of two line segments that are collinear). It is therefore true for triangles in any affine plane over any field.