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After knowing the concept of Demetri we can help to fulfill its curiosity.

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OK.

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In case one is to calculate the height of this building.

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Right.

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So for others what he has to do he has to make a right angle triangle like this.

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OK.

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And this triangle you orders is that one of the side that is the side that presents the height of the

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building and the second side represent the distance of the building from that.

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OK.

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All he has to do is to make sure that this angle accurately with the help of some instrument and after

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knowing this angle he can say that the ratio of these two sides that is the height of the building to

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the distance of the building will always have a constant value for this particular angle.

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And since yes the distance of the building the constant value the height of the building can be easily

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calculated.

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So that's how he's going to calculate the height of the building using imagery not really doable to

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the second case.

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OK.

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And second guess is to calculate the weight of the river.

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So using the concept of vetturino he can't calculate the weight of the river WADA's.

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What he has to do he has to make a right angle triangle like this.

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OK and is writing a triangle you can know that one of the side is along the height of the building.

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Other I represent the weight of the river.

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So you can see this side.

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I really the right of the river and I only require is to calculate this angle OK.

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So for the particular value of this angle the ratio of the height of the building to the weight of the

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river is always we to have a constant value according to the concept of techno victory.

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So I know the building is known to him.

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The constant values don't do him a bit of that it can be easily calculated.

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So that's how he's going to calculate the rate of that ever using trigonometry.

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OK now we take the third case in case we wanted to calculate the speed of the balloon.

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OK.

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So is not at all an easy problem for the kid or the small kid in that endeavor.

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OK.

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It requires a lot of calculation.

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Saurians so I shall explain it briefly how the speed of this balloon is to be calculated.

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You have to just focus on the idea idea is more important because your thinking will develop according

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to techno agree you're going to study the chapter for the.

