# geometry

• Jan 15th 2009, 11:07 AM
dgenerationx2
geometry
In Attachments.
• Jan 15th 2009, 01:07 PM
Soroban
Hello, dgenerationx2!

Quote:

Find $m\angle B\text{ and }m\angle C$.
What theorem was used to find these angles?
Code:

. . . - - - - * * * . . .    *          * . . . A o - - - - - - - o B . . .  *  \          /  * . . .      \      / . . . *      \  /      * . . . *        *        * . . . *      /  \      * . . .      /      \ . . .  *  /          \  * . . . D o - - - - - - - o C . . .    *          * . . .        * * *

The best we can say is: . $\begin {array}{ccc}m\angle B &=& \frac{1}{2}\text{arc}(AD) \\ \\[-4mm] m\angle C &=& \frac{1}{2}\text{arc}(AD) \end{array} \quad\Rightarrow\quad \angle B \:=\:\angle C$

Theorem: An inscribed angle is measured by one-half its intercepted arc.

• Jan 15th 2009, 01:30 PM
dgenerationx2
no. that's all there is
• Jan 16th 2009, 12:26 PM
dgenerationx2
info
This is all the information they gave me to solve this lesson. there is nothing else that i am forgetting.