A and B are vertical angles. If mA=(7x-20° and mB =(6x-1)º, find the
measure of A.

Step-by-step explanation:

We know that ∠A and ∠B are vertical angles.

Remember that vertical angles have the same measure. So:

Substitute them for their equations:

Solve for x. Add 20 to both sides:

Subtract 6x from both sides. So, the value of x is:

To find ∠A, we can use its equation again:

Substitute 19 for 7:

Multiply and subtract:

So, the value of ∠A is 113°.

And we're done!

hi,

you half the rectangle that you ae asking about so then you would see the scale factor of 1/2 the one u have selected, the one on top is half.

hope this !