WHO IS FOUNDER OF GEOMETRTY?

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WHAT IS AN ARC?

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WHAT IS SAS,SSS,ASA AND RHS CIRTERION?

Hi. The founder of geometry is "Euclid". An arc is basically a strike drawn by a compass from a given point. This is an example of an arc :-

In the third part i think you meant to say "WHAT IS SAS,SSS,ASA AND RHS CRITERIA" If yes then the answer is :-

1. SAS- SAS(Side Angle Side) criteria is the criteria in which congruence is proved with 2 sides and 1 angle(The angle should be between the two sides).

2. SSS- SSS(Side Side Side) criteria is the criteria in which congruence is proved with 3 sides whuch are together.

3. ASA- ASA(Angle Side Angle) criteria is the criteria in which congruence is proved with 2 angles and 1 side(The side sholud be between the 2 angles).

4. RHS- RHS(Right angle Hypotenuse Side) criteria is the criteria in which congruence is proved in a right angled triangle which has a right angle, a hypotenuse and a side together.

Hope my answer helps :) . Cheers!!!