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Let's do this question, find the value of X in the figure below.

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All right, what's the video?

3
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Give it a try and then let's do it together.

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All right.

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We're back.

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I hope you have given it a try.

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Over here.

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We have X, right?

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And that's what we need to find.

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Let's mark this angle over here as angle one.

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Now you can see that angle, 30 plus 80 plus.

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Angle one is equal to 180 degree Y because of the angle some property of a triangle.

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Therefore, angle one is equal to 180, minus a hundred and ten, which is equal to 70 degrees.

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All right.

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Now, over here we have a straight angle.

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If you add angle one plus angle X plus 90.

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Right.

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And we know that a straight angle is equal to 180 degrees.

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Therefore, angle one plus X plus 90 equals 180 degrees.

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And we know angle one is equal to 70 degrees.

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Right.

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Therefore, X is equal to 20 degrees.

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And that is your answer.