Calculate angle $ \alpha $ given that it is a bisector.ααα606060AAAaaa

It is not possible to calculate.

Calculate the Angle Bisector: Finding α in a 60-Degree Construction

Q: What exactly does an angle bisector do?

An angle bisector is like a perfect divider - it cuts any angle into two exactly equal parts. Think of it as splitting a pizza slice perfectly in half!

Q: How do I know both angles are the same size?

By definition! The word "bisector" means "cuts into two equal parts." If one angle is 60°, the other must also be 60°.

Q: What if I calculated a different angle measure?

Double-check your understanding of angle bisectors. They always create equal angles. If you got a different answer, review the definition and try again.

Q: Does this work for any angle size?

Yes! Whether the original angle is 30°, 90°, or 120°, the bisector always creates two equal parts. So if one part is x°, the other is also x°.

Q: How can I remember this concept?

Think of the prefix "bi-" (like bicycle = 2 wheels). A bisector creates 2 equal angles. Equal is the key word!

Angle Bisectors with Equal Division Property

Calculate angle $\alpha$ given that it is a bisector.

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations

00:00 Find angle A

00:03 Angle bisector according to the given data

00:06 We'll substitute an appropriate value according to the given data, and find angle A

00:09 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution

Understand the problem

Calculate angle $\alpha$ given that it is a bisector.

Step-by-step solution

Since an angle bisector divides the angle into two equal angles, and we are given that one angle is equal to 60 degrees. Angle $\alpha$ is also equal to 60 degrees

Final Answer

Key Points to Remember

Essential concepts to master this topic

Rule: An angle bisector divides an angle into two equal parts
Technique: If one part equals 60°, then $\alpha = 60°$
Check: Both angles should be equal: 60° = 60° ✓

Common Mistakes

Avoid these frequent errors

Assuming the bisector creates different angle measures
Don't think that $\alpha$ must be different from the given 60° angle = creates unequal division! This violates the definition of an angle bisector. Always remember that a bisector creates two identical angles.

Practice Quiz

Test your knowledge with interactive questions

BD is a bisector.

What is the size of angle ABC?

FAQ

Everything you need to know about this question

What exactly does an angle bisector do?

An angle bisector is like a perfect divider - it cuts any angle into two exactly equal parts. Think of it as splitting a pizza slice perfectly in half!

How do I know both angles are the same size?

By definition! The word "bisector" means "cuts into two equal parts." If one angle is 60°, the other must also be 60°.

What if I calculated a different angle measure?

Double-check your understanding of angle bisectors. They always create equal angles. If you got a different answer, review the definition and try again.

Does this work for any angle size?

Yes! Whether the original angle is 30°, 90°, or 120°, the bisector always creates two equal parts. So if one part is x°, the other is also x°.

How can I remember this concept?

Think of the prefix "bi-" (like bicycle = 2 wheels). A bisector creates 2 equal angles. Equal is the key word!

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