Let be a triangle such that , , . Let be the midpoint of side . If the circle through , and cuts at and , what is ?
$
\textbf{(A)}\ \dfrac 23
\qquad\textbf{(B)}\ 1
\qquad\textbf{(C)}\ \dfrac 32
\qquad\textbf{(D)}\ 2
\qquad\textbf{(E)}\ 3
$
Let be a triangle such that , , . Let be the midpoint of side . If the circle through , and cuts at and , what is ?
$
\textbf{(A)}\ \dfrac 23
\qquad\textbf{(B)}\ 1
\qquad\textbf{(C)}\ \dfrac 32
\qquad\textbf{(D)}\ 2
\qquad\textbf{(E)}\ 3
$
1. Identify the given information and the goal:
- We have a triangle with sides , , and .
- is the midpoint of , so .
- We need to find the length of where is the point where the circle through , , and intersects again.
2. Apply the Power of a Point theorem:
- The Power of a Point theorem states that for a point outside a circle, if a line through intersects the circle at points and , then .
3. Substitute the known values into the Power of a Point equation:
4. **Solve for :**
5. **Determine using the segment subtraction:**
- Since is on , we have .
The final answer is