Somebody me with these two questions asap i have class soon and i don’t understand someone asap.

2.

The 21 degree angle shown is a corresponding angle to angle 3, which means they are identical, so angle 3 is 21 degrees.

Angle 3 and 4 are supplementary angles which need to add up to 180 degrees.

Angle 4 = 180 - 21 = 159 degrees.

3. A bisector means both sides are the same length.

Set the two equations to equal to solve for x:

4x+12 = 2x +18

Subtract 2x from both sides:

2x +12 = 18

Subtract 12 from both sides:

2x = 6

Divide both sides by 2:

x = 3

Now you have x, solve both equations and add them together:

4(3) +12 = 12+12 = 24

2(3) +18 = 6+18 = 24

24 +24 = 48

AB = 48