Science

# How do you construct an altitude in geometry?

By: Geoff GustafsonUpdated: February 06, 2021

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An altitude is a line segment in a triangle from a vertex to the side opposite that vertex, and perpendicular to that side. So, in order to construct an altitude, first swing an arc from the vertex that is large enough to intersect the opposite side twice.

Keeping this in view, how do you find the altitude of a triangle given 3 sides?

If you know the base and area of the triangle, you can divide the base by 2, then divide that by the area to find the height. To find the height of an equilateral triangle, use the Pythagorean Theorem, a^2 + b^2 = c^2.

Beside above, is the altitude of a triangle the same as the height?

In a triangle, a line segment from a vertex and perpendicular to the opposite side is called an altitude. It is also called the height of a triangle. When a triangle is a right triangle, the altitude, or height, is the leg.

What is the Orthocenter of a triangle?

The orthocenter is the point where all three altitudes of the triangle intersect. An altitude is a line which passes through a vertex of the triangle and is perpendicular to the opposite side. There are therefore three altitudes in a triangle.

What is the altitude of a right triangle?

In geometry, an altitude of a triangle is a line segment through a vertex and perpendicular to (i.e., forming a right angle with) a line containing the base (the side opposite the vertex). This line containing the opposite side is called the extended base of the altitude.

## Related

### How do you find the height in a triangle?

If you know the base and area of the triangle, you can divide the base by 2, then divide that by the area to find the height. To find the height of an equilateral triangle, use the Pythagorean Theorem, a^2 + b^2 = c^2.

### Where is the centroid of a triangle?

A centroid of a triangle is the point where the three medians of the triangle meet. A median of a triangle is a line segment from one vertex to the mid point on the opposite side of the triangle. The centroid is also called the center of gravity of the triangle.

three altitudes

### How do you circumscribe a triangle?

Circumscribe a Circle on a Triangle
1. Construct the perpendicular bisector of one side of triangle.
2. Construct the perpendicular bisector of another side.
3. Where they cross is the center of the Circumscribed circle.
4. Place compass on the center point, adjust its length to reach any corner of the triangle, and draw your Circumscribed circle!

### What is Circumcentre of a triangle?

The Circumcenter of a triangle
One of several centers the triangle can have, the circumcenter is the point where the perpendicular bisectors of a triangle intersect. The circumcenter is also the center of the triangle's circumcircle - the circle that passes through all three of the triangle's vertices.

### What is the formula for median of a triangle?

It is a bit wordy, but can be translated into a formula. First, the Theorem: Apollonius's Theorem states that in any triangle, the sum of the squares on any two sides is equal to twice the square on half the third side together with twice the square on the median which bisects the third side.

### What is a median of a triangle?

In geometry, a median of a triangle is a line segment joining a 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.

### How do you construct the median of a line?

Univ.
A median of a triangle is a line segment from a vertex to the midpoint of the opposite side. This can be done by first constructing a perpendicular bisector on the side of the triangle opposite the desired vertex, and marking the point at which the bisector intersects the side of the triangle.

### How do you construct the three medians of a triangle?

Constructing a median with a compass
1. Open the compass past the estimated midpoint of the side.
2. Keeping the same setting, move to the vertex on the opposite side of the side you are working with.
3. Strike an arc such that it intersects the first arc twice.
4. Use a straightedge to find the midpoint of the side.

### What is the altitude rule?

The altitude to the hypotenuse of a right triangle is the mean proportional between the segments into which it divides the hypotenuse. Altitude Rule: Notice the triangle used with this rule! It is the same diagram used in the first theorem on this page - a right triangle with an altitude drawn to its hypotenuse.