# Inscribed Angle Intercepts Semicircle

Use coordinate geometry to prove that in a circle, an

**inscribed angle that intercepts a semicircle**is a**right angle.**That is, write a coordinate geometry proof that formally proves what this applet informally illustrates.*Hint: Write the equation of the provided circle in standard form first, and use coordinate geometry to prove that the two sides of this***inscribed angle**are perpendicular.## New Resources

## Discover Resources

Download our apps here: