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**Warm up**Use Pythagorean Theorem to find the missing side. Round to the nearest tenths. 8.2 yd Welcome back. 8.3 m 2.2 ft**TANGENTS**A line is tangent to the circle only if it is perpendicular to the radius drawn to the point of tangency**Is AD tangent or not tangent?**No, point D is not tangent to the circle.**Is AB tangent or not tangent?Use Pythagorean Theorem to find**out. Yes 682 + 512 = 852**Is AB tangent or not tangent?Use Pythagorean Theorem to find**out. No 82 + 162 192**Solve for x.**x2 + 962 = 1002 x = 28 BC is a radius of Circle C AB is tangent to Circle C**Solve for x.**x2 + 482 = 802 x = 64 BC is a radius of Circle C AB is tangent to Circle C**Solve for x.**x2 + 322 = (x + 16)2 32x = 768 x = 24 BC is a radius of Circle C AB is tangent to Circle C**Solve for x.**x2 + 562 = (x + 32)2 64x = 2112 x = 33 BC is a radius of Circle C AB is tangent to Circle C**Solve for x.**x2 + 992 = (x + 81)2 162x = 3240 x = 20 BC is a radius of Circle C AB is tangent to Circle C**Solve for x.** 7.1 x 6**EF**EG**S**Party hat problems! If two segments from the same exterior point are tangent to a circle, then they are congruent. R T**Solve for x**C P**Find NP**N T S P R Q**Homework**?