Please help! I think I have the equation set up.

Given :-Here, we have given one quadrilateral that is quadrilateral ABCD We also have given the angles of quadrilateral that is ( 6x + 5)° , ( 9x - 10)° , 80° and a right angleTo Find :-

Here, we have to find the value of x

Let's Begin :-

We have given quadrilateral ABCD here , whose angles are as follows

Angle A = ( 6x + 5)°Angle B = ( 9x - 10)°Angle C = 80°Angle D = A right angled triangle

[ The measure of right angled triangle is 90° ]

We know that,

Sum of the angles of quadrilateral is equal to 360°

That is

Subsitute the required values

Hence, The value of x is 13 .

Measure of Angle A

Measure of Angle D

Now, we know that,

Sum of angles of triangles is equal to 360°

That is,

Hence, Proved.

The surface area would be 576 because you multiply all the numbers then multiply that number by 6