The observed redshifts of galaxies are evidence for the big bang theory of the origin of the universe because they indicate that

Are moving rapidly away in all directions

Explanation:

Edwin Hubble discovered in 1929 that the distance to far away galaxies were generally proportional to their red shifts astronomers viewing distant stars see evidence of this expansion evidence of red shift

I hope this helps Mate :) Sorry im late

Step-by-step explanation:

When two secants or a secant and a tangent of a circle intersect outside the circle, the measure of the acute angle formed is equal to half of the positive difference of smaller and larger arc formed.

Therefore, we have the equation:

Distribute:

Add 2 to both sides and subtract from both sides:

Divide both sides by 1/2:

Now substitute into :