Table of Contents

## What are angles in standard position?

Standard Position: An angle is in standard position if its vertex is located at the origin and one ray is on the positive x-axis. The ray on the x-axis is called the initial side and the other ray is called the terminal side. The angle is measured by the amount of rotation from the initial side to the terminal side.

## How do you determine if an angle is in standard position?

An angle is in standard position if its vertex is located at the origin, and its initial side extends along the positive x-axis. See (Figure). Figure 5. If the angle is measured in a counterclockwise direction from the initial side to the terminal side, the angle is said to be a positive angle.

**Which angles in standard position are Coterminal?**

Coterminal angles: are angles in standard position (angles with the initial side on the positive x-axis) that have a common terminal side. For example, the angles 30°, –330° and 390° are all coterminal (see figure 2.1 below).

**What best describes an angle?**

In Euclidean geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed by two rays lie in the plane that contains the rays. Angles are also formed by the intersection of two planes.

### What is positive angle?

Definition. The amount of rotation of a ray from its initial position to final position in anticlockwise direction is called positive angle. Positive angles are written by writing with or without plus sign before the angle.

### What are standard angles in trigonometry?

The important angles of trigonometry are 0°, 30°, 45°, 60°, 90°. These are the standard angles of trigonometric ratios, such as sin, cos, tan, sec, cosec, and cot. Each of these angles has different values with different trig functions.

**What is a positive angle?**

**What is the angle for AxB?**

|AxB| = AB if A and B are perpendicular, because then θ = 90o or θ = 270o degrees. This gives the maximum magnitude.

## What is the Coterminal angle of 90?

Coterminal angle of 90° (π / 2): 450°, 810°, -270°, -630° Coterminal angle of 105°: 465°, 825°,-255°, -615° Coterminal angle of 120° (2π / 3): 480°, 840°, -240°, -600°

## How do you know if two angles are Coterminal?

If two angles are drawn, they are coterminal if both their terminal sides are in the same place – that is, they lie on top of each other. In the figure above, drag A or D until this happens. If the angles are the same, say both 60°, they are obviously coterminal.

**Which best describes the angle below?**

Acute angle best describes the angle below.