Mathe help?

Question

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Answer 1

17)

Triangle are similar.

Observe the triangles,

Since,

The equations are 

Find

The value of

Answer 2

18)

Step 1:

Triangle are similar.

Observe the triangles,

Since,

The equations are 

Find

Solution:

The value of

Answer 3

19)

Observe the circle.

Angle  measures 

Point  is the center of the circle.

Find arc  measures.

The measure of an arc is equal to the central angle.

Since  is the center of the circle,  is the central angle for the arc .

The arc  is angle 

Answer 4

20)

Observe the circle,

Angle measures

Point is the center of the circle.

Find arc measures.

The measure of an arc is equal to the central angle.

Here,  is the center of the circle, is the central angle for the arc .

Since, Point D is NOT LOCATED of angle .

It is not possible to measures arc .

Answer 5

21)

Observe the triangles,

Consider the center of the point is c.

Triangle are congruent.

Observe the triangles,

Since,

Find

The value of