Dragan

∠DEF = ∠FEG

∠DEF = 5x - 3

∠FEG = 2x + 15

5x - 3 = 2x + 15             solve for x 

That question has been answered right  _ !!! 

                                                                                                                                                                      https://web2.0calc.com/questions/in-the-diagram-below-angle-pqr-angle-prq-angle-str#r2

∠QPR + ∠RPS = ∠QPS

-7x - 38 + 27 = -13x -53 

x = -7

Now, you can calculate the angles easily. 

∠1 = ∠4

6x + 25 = 10x - 11

x = 9

∠1 = 6x + 25 = 79º

A rectangular prism has a length of 3, a width of 4, and a height of 12. What is the distance (D) between two opposite corners of the prism? 

The diagonal of the base:   d = sqrt( 3² + 4² ) = 5

The distance D = sqrt( 5² + 12² ) = 13

19x +86 + 16 = 16x + 90

x = - 4

∠RPS = 19x + 86 = - 76 + 86 = 10º

∠QPS = 16x + 90 = - 64 + 90 = 26º  

The question should be: what is the ratio of the area of the shaded region to the area of both circles?

If AC is parallel to OB, that doesn't make BC parallel to AO.

There's not enough informatio for this problem to be solved!!!

2²,   3²,   and  4²    

Try this:       8x + 51 + 6x - 25 = 180