What is the value of a + b? You may assume that the ray is tangent to the circle.
180
128
90
64
Answers
If you are not satisfied with the answer or you can’t find one, then try to use the search above or find similar answers below.
Find similar answers
Mathematics, added 2020-09-28 16:52:41
Mathematics, added 2020-09-28 08:46:45
Mathematics, added 2020-09-25 03:12:36
Use a proportion to convert 18 grams to milligrams. [Hint: 1,000 mg = 1 g.] ...
Mathematics, added 2020-09-25 02:12:06
Use a proportion to convert 18 grams to milligrams. [Hint: 1,000 mg = 1 g.] ...
Mathematics, added 2020-09-24 21:29:24
Which measurement is the best estimate for the capacity of a can of soda ...
Mathematics, added 2020-09-24 20:11:37
Which measurement is the best estimate for the capacity of a can of soda ...
Mathematics, added 2020-09-23 05:15:01
Determine the next term in the geometric sequence. 1024, 512, 256, 128, ? ...
Mathematics, added 2020-09-23 03:44:04
Determine the next term in the geometric sequence. 1024, 512, 256, 128, ? ...
Answered by calculista
See the attached picture to better understand the problem we know that if the ray is tangent to the circle then diameter ABC is perpendicular to ray FC and the value of (a + b) is equal to 90 degrees let's check it step 1 find measure arc DC arc DC=180-54-----> 126 ° ∠DBC=126°------> by central angle step 2 find angle a ° we know that The inscribed angle measures half of the arc it comprises. so ∠a=arc AD/2----> 54/2--->∠a= 27° ∠b=arc DC/2----> 126/2---> ∠b=63° ∠a+∠b=27+63----> 90°------> is ok the answer is a+b is equal to 90 degrees