Answer:
The following are the ways a citizen can participate in the affairs of their country:
- 1) By voting in elections:
Every citizen of a democratic country has the right to vote in elections once they reach their legal voting age. This is one of the key ways a citizen can participate in the affairs of their country. By choosing a representative who they believe can strengthen the government, the citizen plays an important role as this person gets to be the next leader of the nation.
- 2) By joining political parties / political forces:
Once a citizen joins a political party, it means that he/she has understood the party ideology & finds it admirable and strengthening for the country.
- 3) By participating in party meetings:
By participating in party meetings, citizens can find out the new schemes organised by the government, the various rights they have, etc. They can also object to the policies if they have different opinions.
- 4) By becoming a representative:
Citizens not only have the right to vote but they can also stand as representatives whether individually or by joining a party. This way the cirltizen can directly interfere into the affairs of their country & express their views and opinions on the basis of public support.

NOTE:
*All these opinions are more likely to happen in democratic countries. In countries where monarchy, dictatorship or one party rule prevail, citizens might not get equal rights to participate in the affairs of their country.

Answer:
Concentric circles are circles with a common center. The region between two concentric circles of different radii is called an annulus. Any two circles can be made concentric by inversion by picking the inversion center as one of the limiting points.
1. Picking any two points on the outer circle and connecting them gives 1/3.
2. Picking any random point on a diagonal and then picking the chord that perpendicularly bisects it gives 1/2.
3. Picking any point on the large circle, drawing a line to the center, and then drawing the perpendicularly bisected chord gives 1/4.
So some care is obviously needed in specifying what is meant by "random" in this problem.
Given an arbitrary chord BB^' to the larger of two concentric circles centered on O, the distance between inner and outer intersections is equal on both sides (AB=A^'B^'). To prove this, take the perpendicular to BB^' passing through O and crossing at P. By symmetry, it must be true that PA and PA^' are equal. Similarly, PB and PB^' must be equal. Therefore, PB-PA=AB equals PB^'-PA^'=A^'B^'. Incidentally, this is also true for homeoids, but the proof is nontrivial.
Answer:
Explained below
Explanation:
American independence brought Democracy to the United States. People followed the rule of government strictly based on Constitution. One of the initial key features was the voting right in the federal elections granted to the citizens: who were at least 21 years old. This restriction was resolved through Constitutional Amendments extending the voting privilege to any citizen who is at least 18 years old meeting the essential criteria mentioned in the law.
1) The Fifteenth Amendment (1870) gave African-American men the right to vote.
"right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of race, color, or previous condition of servitude."
2) The Nineteenth Amendment (1920) assures each and every American women the right to vote.
“the right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of sex.”
3) The Twenty-sixth Amendment (1971) lowered the voting age from 21 to 18.
“the right of citizens of the United States, who are eighteen years of age or older, to vote shall not be denied or abridged by the United States or by any State on account of age.”
Hence, US has witnessed remarkable changes to ensure "every eligible American citizen's civic responsibility to vote."