6 maybe? I used Siri sorry if it’s wrong
Answer:
I'm not sure, can you post any options?
A triangle equals 180 so you do....
90+45+x=180
135+x=180
-135 -135
x= 45
angle C is 45 degrees
then theres a linear equation for angle C, so you do...
45+x=180
-45 -45
x= 135
angle ACD= 135 degrees
In this question, it is given that two of the dimensions are 3 cm and 9 cm . Let the other dimension be x cm .
And the surface area of the rectangular prism is given. Now we use the formula of surface area of prism, which is
Subtracting 27 to both sides,
Dividing both sides by 12
So the length of the remaining dimension is 6 cm .