Tangent-secant theorems
Plane geometry · Mathematics
Study notes
Q: From external point P, tangent PT = 8, secant PAB with PA = 4. Find PB. PT² = PA×PB: 64 = 4×PB. PB = 16. Check: external segment × whole secant = 4×16 = 64 = 8² ✓!
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Plane geometry · Mathematics
Q: From external point P, tangent PT = 8, secant PAB with PA = 4. Find PB. PT² = PA×PB: 64 = 4×PB. PB = 16. Check: external segment × whole secant = 4×16 = 64 = 8² ✓!