What are terminal and initial sides of an angle?

👉 Learn about angles in trigonometry. An angle is the figure formed by two rays sharing the same endpoint. The two rays are called the sides of the angle while the common endpoint of the two rays is called the vertex of the angle.

Angle is measured in radians or in degrees. The radian is the measure of the length of an arc of a unit circle or the measure of the radius of the circle on the circumference of the circle. pi radians is equivalent to 180 degrees. One complete revolution about a point is equivalent to 2pi radians and 360 degrees. A plane is usually divided into 4 equal parts called the quadrants.

The angle measured in the anti-clockwise direction is called a positive angle while a negative angle is measured in the clockwise direction. We measure angles starting from the positive x-axis.

Organized Videos:
✅ Angles in Trigonometry
✅ Solve Problems with Arc Length
✅ Angles in Trigonometry | Learn about
✅ Sketch Angles in Standard Position
✅ Find the Quadrant of the Angle
✅ Find the Reference Angle
✅ Complement and Supplement of an Angle
✅ Convert Radians to Degrees
✅ Convert Degrees to Radians
✅ Convert Degrees to Degree Minute Seconds
✅ Convert Degree Minute Seconds to Degrees
✅ Coterminal Angles | Learn About
✅ Find Coterminal Angles | 0 and 2pi
✅ Find Coterminal Angles | 0 and 360

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[hdadam]

Thanks for the clear instruction, helped me with what i was confused.

[cynthiabostwick]

This really helped me with my homework thank you

[ethanos__]

So which side is initial if i have to plot (-7, 2) and then draw a line to the origin. Is the initial side negative x or positive x?

[aeja]

Hi, this was very helpful thank you! Do you happen to have a playlist that includes this and similar videos?

[arturogonzalez]

Is it possible to have an infinite angle? Because I know that if you were to go an infinite amount of times that it would never stop at the terminal, but, could you create a paradox where it's possible?

[jonathantorino]

Is the initial side always in positive horizontal lines or not??

[hafsawaseem]

I wish if you can write what you say because you speak fast so I can't understand very well 😢

[Emmanuel-xrpt]

hey what if there is no horizontal line?

[jemuzu]

Ah Big Thanks from a little tadpole to A Frog.

[RahulRahul-tfhk]

Plz sir next time try to speak slow 😥😥😰 because ur explanation is very fast 😰😰