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Let's do this question, a semicircle is drawn with Abbasids diameter from see a point on a B, a line

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perpendicular to abs drawn meeting the circumference of the circle at D, given that a two centimeter

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CBDs equal to six centimeter, the area of the semicircle in square centimeter will be all right.

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Pause the video, give it a try and then let's do it together.

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All right.

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We back.

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I hope you have given it a try.

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Let's do it together.

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Now you have a circle over here and AB is the diameter.

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See the point on eBay and we draw KDDI such that this angle over here is 90 degrees.

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Now it's given that it's easy to centimeter and see what is equal to six centimeter.

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All right.

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Now we need to find the area of this semicircle over here right now.

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Let's extend sorry so that it meets the circle over here.

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All right, now these two sides are equal, right, because this is the diameter.

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Now, therefore, this is six and this is also equal to six.

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Let me call this point US leadership.

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All right.

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And let this be of length right now.

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These two are now intersecting sequence.

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Right?

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Therefore, we know that C D into C dash will be equal to see in two c.b right in the city.

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That is equal to the as per intersecting sequence what we learned in that section.

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Now, therefore, I can say that six to six.

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This is also six six.

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Six is equal to two in the white.

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Now, let me solve for why I get why is equal to 18 centimeters.

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Now, what is the diameter?

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The diameter B is two plus white.

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That's two plus 18, which gives you 20 centimeter ends.

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The radius extends centimeter.

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And we know that the area of a circle is by our square and we are asked to find the area of the same

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circle.

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So the area of the semicircle is Byaah Square, divided by two.

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That's equal to buy into Penn Square by two.

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Right.

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So that's equal to a hundred by two, which is fifty fifty in two point.

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So the answer is option B. That's 50 by centimeter square.