- Sun Aug 09, 2009 11:42 pm
- Forum: Trigonometry
- Topic: Exponets (2)^3 / (2)^-2 ---- ---- (5) (5)
- Replies:
**2** - Views:
**1924**

I thing\k it is pretty clear that the expression is

- Sun Jul 05, 2009 6:20 am
- Forum: Geometry
- Topic: Chords in circle: If mAD = 58, m<AED = 42, find BC
- Replies:
**4** - Views:
**4073**

42 is the mean (average) of the intercepted arcs. (mAD + mBC)/2 = 42. Since we know that mAD = 58, (58 + mBC)/2 = 42, (58 + mBC) = 84, mBC = 26

Polyhymnio

Polyhymnio

- Mon Jun 22, 2009 4:27 am
- Forum: Geometry
- Topic: Chords in circle: If mAD = 58, m<AED = 42, find BC
- Replies:
**4** - Views:
**4073**

The measure of the angle between intersecting chords is equal to the mean of the measures of their intercepted arcs. Since <AED and <BEC are vertical angles, (mAD + mBC)/2 = 42. Then mBC = (42)(2) - 58 = 26

Polyhymnio

Polyhymnio