I have to calculate the area of the sector created by ADB.

http://curriculum.kcdistancelearning.com/courses/GEOMx-HS-WA10/b/assessments/C-CirclesExam/Geometry_7_Exam_102q3.gif

I know the area of the circle, which is 254.34, do I need that to solve this? If so, how do I do that?

Question

I have to calculate the area of the sector created by ADB. 

http://curriculum.kcdistancelearning.com/courses/GEOMx-HS-WA10/b/assessments/C-CirclesExam/Geometry_7_Exam_102q3.gif

I know the area of the circle, which is 254.34, do I need that to solve this? If so, how do I do that?

zepp · Answer

What's the measurement of the angle ADB?.

anonymous · Answer

I don't know. It doesn't tell me. I included the picture in my question.

amistre64 · Answer

it does tell you, you just have to be able to decipher it

amistre64 · Answer

how many degrees are in a straight line?

amistre64 · Answer

or, since you know the total area; divide it in half and then take off that 20 degree part; amounts ot the same thing

anonymous · Answer

how many degrees are in a circle then divide my 2

zepp · Answer

360 - Angle ACB (Which is 180 + 20) = 160
So for 360 degrees, area is 254.34
for 160 degrees in the same circle, area is..?

Set up a proportion, then solve it :)