Does anyone know how to do this plz !

The answer to your question is Yes !  Many people know how to solve this.

It's actually pretty interesting, so I'll run through it for you:


Each corner of the screen is a right angle, so any diagonal
divides the screen into two right triangles, of which the diagonal
is the hypotenuse. 

The legs of any of those right triangles are 7.2-ft and 9.9 ft,
and Pythagoras tells us that the length of the hypotenuse is

√(7.2² + 9.9²)

= √(51.84 + 98.01)

= √149.85

= 12.2413... ft

Rounded to the nearest tenth of a foot, that's 12.2 ft.  

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c