27)

Step 1:

Observe the circle,

Circle are congruent.

is congruent to

Then,

is congruent to

Then,

Find

Solve two equations.

Solution:

The values are

28)

Step 1:

Observe the circle,

Circle are congruent.

is congruent to

Then,

is congruent to

Then,

Find

Solve two equations.

Solution:

The values are

29)

Step 1:

Observe the circle,

Circle are congruent.

is congruent to

Then,

is congruent to

Then,

Find

Solve two equations.

Solution:

The values are

30)

Step 1:

Observe the circle,

Circle are congruent.

is congruent to

Then,

Find length of

Solve the equations.

Solution:

The length of