Question

I really need help with number 9 find the value of x that makes abcd a parallelogram.

Answer 1

Given:

The adjacent angles of a parallelogram are 78 and x+10.

To find:

The value of x.

Step-by-step explanation:

We know that,

The sum of the adjacent angles in a parallelogram is supplementary.

So, we can write,

`\begin{gathered} 78+x+10=180 \\ x+88=180 \\ x=180-88 \\ x=92 \end{gathered}`

Thus, the value of x is 92.

Final answer:

The value of x is 92.