Help me with this khan acadamy question

x° = 100°

Solution:

The reference image to the answer is attached below.

Given ∠AOC = 100°, ∠BOD = x°

To find the value of x°:

∠AOC and ∠BOD are vertically opposite angles.

Vertical angle theorem:

If two lines are intersecting each other, then vertically opposite angles are congruent.

In the given image line AB and line CD are intersecting angles.

They intersect at point O.

By vertical angle theorem, they are congruent.

⇒ ∠AOC ≅ ∠BOD

⇒ m∠BOD = 100°

⇒ x° = 100°

Hence the value of x° is 100°.

your answer is b ^w^ hope i

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk