Calculate the Missing Angle: Given 20° in Parallel Lines with Transversal

Angle 1 is 20 degrees.

Calculate the size of angle 2.

12

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00:00 Determine angle 2
00:10 Vertical angles are equal
00:15 Here is the solution

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1

Understand the problem

Angle 1 is 20 degrees.

Calculate the size of angle 2.

12

2

Step-by-step solution

Remember the definition of vertically opposite angles:

Vertically opposite angles are formed between two intersecting lines, and they actually have a common vertex and are opposite each other. Vertically opposite angles are equal in size.

Therefore:

1=2=20 1=2=20

3

Final Answer

20 20

Practice Quiz

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If one of two corresponding angles is a right angle, then the other angle will also be a right angle.

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