+0  
 
+1
31
4
avatar+64 

PA and PB are both tangents to cicrle C with mADB = 225.

file:///C:/Users/Student/Documents/Quiz%204.11_%234.JPG

 

A. 90°

B. 45°

C. 135°

D. 112.5°

THEMAN31  Jun 7, 2018
 #1
avatar+12561 
+1

Sorry, TM31....that is not a web address.....that is a file  address on the computer to which you are using/connected.

ElectricPavlov  Jun 7, 2018
 #2
avatar+64 
+1

sorry here is the one

https://learning.k12.com/d2l/common/viewFile.d2lfile/Database/Mzg1MzA1NQ/Quiz%204.11__4.JPG?ou=374067

THEMAN31  Jun 7, 2018
 #4
avatar+12561 
+1

See #5   at:

https://mathbitsnotebook.com/Geometry/Circles/CRAngles.html

ElectricPavlov  Jun 7, 2018
 #3
avatar+86889 
+2

If ADB  = 225°, then minor arc AB  = 360  - 225  = 135°

 

And the measure  of APB  =

 

(1/2) ( measure of arc ADB  -  measure of  minor arc AB )  =

 

(1/2) ( 225  - 135)  =

 

(1/2)(90)  =

 

45°

 

 

cool cool cool

CPhill  Jun 7, 2018

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