Finding Angle ABC: Geometric Construction with 100° Angle DBC

Determine the size of angle ABC?

DBC = 100°

DDDBBBCCCAAA10040

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:06 Let's find angle ABC.
00:10 This angle is at point B, between points A and C.
00:15 Using the given data, we can find the size of the angle.
00:20 And that's how we solve this question.

Step-by-step written solution

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1

Understand the problem

Determine the size of angle ABC?

DBC = 100°

DDDBBBCCCAAA10040

2

Step-by-step solution

We can see from the diagram that angle DBC equals 100 degrees.

We can also see that the size of angle ABC is shown and equals 40 degrees.

Therefore, the answer is 40.

3

Final Answer

40

Practice Quiz

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Indicates which angle is greater

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