A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
I can't find the missing angles.
anonymous
 one year ago
I can't find the missing angles.

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1437537537663:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0My textbook says that angle ABC=111 and angle CDE=129

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0That is the answer but how do i get it?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2ABCDE is a pentagon.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2A pentagon has 5 sides. The sum of the measures of the internal angles of a pentagon is (n  2)180 = (5  2)180 = 3(180) = 540

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2dw:1437538174022:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0then the ? on the left is 51 and the ? on the right is 69

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0math student 55 am i right?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2540  120  60  60  30  30  60  60 = 120 The sum of the measures of the missing angles is 120.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I don't understand how you would get ? though.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2dw:1437538419243:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2dw:1437538472592:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2dw:1437538502849:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2The inscribed angle <CDA is half the measure of the arc CBA

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2dw:1437538600159:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2dw:1437538634138:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay then. I see how you got it. Thanks for the help. :)

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2I assumed that O is the center of the circle. Is my assumption correct?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Then you don't need to use the angles of a pentagon like I did above.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2You need to know that a central angle measures the same as its arc. An inscribed angle measures half of its arc.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2dw:1437538880449:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh i was kinda confused about why the inscribed measures half of its arc.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Here is how you solve this problem. It is very few steps. 1. Arcs DE and BA are 60 degrees like their central angles. dw:1437538961885:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.22. Arc CDE is 42 + 60 = 102 deg m<CBE = 51 dw:1437539067048:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.23, Subtract 360  42  60  120  60 = 78 to find arc BC If BC = 78, then arc ABC = 138 m<CDA = 1/2 m(arc)ABC = 69 dw:1437539126457:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thanks @mathstudent55 :D Your the best! I understand it better now.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.