Proving and using geometric properties

If DB bisects ∠ABC, then ∠ABD = ∠CBD.

• Definition of Congruent Angles
• Definition of Angle Bisector
• Angle Addition Postulate
• Definition of Right Angle

Which proportion should you use to find x?

• 15 / x = 7 / 14

• x / 7 = 14 / 15

• 7 / x = 15 / 14

• x / 15 = 7 / 14

Solve for x

Leave in simplest radical form

• 6

Find m< JKM

• 90
• 76
• 38
• 83

Find  $m\angle IKH.$  

• 30

• 15

• 90

• Cannot be determined.

Find the value of X

• 8.5

• 3.6

• 7.2

• 9.2

Find x.

• 9

• 72

• 121

• 5√3

Find the missing length.

• 14
• 20
• 16
• 10

Find the value of x.

• 21

• 3

• 81

• 9

• 18

What is the value of b?  *Find the length of the altitude first.*

• 4

•  $6\sqrt{3}$  

• 28

•  $8\sqrt{3}$