ISSN: 2689-7636

Short communication
Open Access Peer-Reviewed

Kanjampatti P.O, Pollachi Via, Tamil Nadu 642003, India

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**Copyright Licence**

**MSC:** 51M04.

Let us assume that the sum of the interior angles of cosmic triangles ADE, AFG, AHJ, and ABC are x, y, m, and m respectively. (1)

All these cosmic triangles are similar. i.e sides, AD = AE, AF= AG, AH – AJ and AB = AC (2)

So, consequently, we get that angles ADE = AED, AFG – AGF, AHJ – AJH, and ABC= ACB

Since the lateral sides are equal, the base angles are also equal. Angle BAC is common to all cosmic triangles Figure 1.

Let us assume that, xy = a (3)

yz = b (4)

zm = c (5)

Dividing (3) by (4), x / z = a / b (6)

Dividing (4) by (5), y/ m = b/ c (7)

Dividing (6) by (7), xm/ yz = a/ c (8)

Cross multiplying, xmc = yza (9)

Applying (3) in RHS, xmc = yz.xy

i.e mc = y2z

Assuming (5) in LHS, m.zm = y2z

i.e m = y (10)

Comparing (10) and (1) we get that the sum of the interior angles of cosmic triangles AFG and ABC are equal.

The summit angle BAC and FAG are common to both the cosmic triangles AFG and ABC are equal.

So, since the base angles of isosceles triangles are equal, we get that the angles AFG, AGD, ABC, and AC B are equal.

This establishes that cosmic triangles AFG and ABC are similar. Consequently, we obtain that the sum of these two each cosmic triangles ABC and AFG is equal to 180m degrees.

From this, we have proved that the shape of our Universe is exactly flat.

The geometry of the Universe reveals whether the Universe is finite or infinite. The curvature of the Universe determines the geometry of the Universe. The flat Universe has zero curvature, the positive curvature reveals that the Universe is closed or positive, and the negative curvature confirms that the shape of our Universe is open. In other words, the zero, positive and open curvatures of the universe establish that the shape of the Universe is Euclidean, elliptic, and hyperbolic respectively. This implies that the sum of the interior angles drawn in Euclidean, elliptic and hyperbolic spaces is equal to 180 degrees, more than 180 degrees, and less than 180 degrees respectively. Since we have shown that the sum of the interior angles of the cosmic triangles is equal to 180 degrees, the Universe is FLAT. The author has published eight articles on this topic [1–8]. Each work used different approaches. This result has been found by assuming the product and division rules of number theory and algebra. The author’s finding is only the beginning of the game. We have to find the topology of the Universe which will show the hidden mysteries of our Universe.

- Link: https://bit.ly/3wCrxyq
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- (2021) Academia Arena. 13. Link: https://bit.ly/3Iugdqw
- S Kalimuthu (2020) On freedman equation and the shape of our universe. Ann Math Phys 30-31. Link: https://bit.ly/36HIs7I
- S Kalimuthu (2021) On Friedman equation, quadratic laws and the geometry of our universe. Int J Phys Res Appl 48-50. Link: https://bit.ly/3IAAjze

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