# Altitude (Geometry) Definition

In geometry, an **altitude for triangles** is defined as the **line segment leaving from a vertex** (forming an angle of 90°) **perpendicular to the base** (the opposite side) **of a vertex**. The **line between** the **base and the vertex** is known as **altitude**.

In other words, the **altitude in geometry** is defined as the **length of a triangle** from the **apex to the base of a triangle**.

Every **triangle **consists of **three altitudes**, and where the **line of each altitude intersects with each other** is known as the **orthocenter of the triangle**.

For a more precise understanding, check out the example listed below:

**Note:**

To know about attribute, you can use our Attribute Definition.