1. LATERAL AREA of a HEMISPHERE GEO188 The lateral surface of a HEMISPHERE is the dome. The lateral surface area is half the surface area of a sphere. LSA hemisphere = 2  r 2 3 in LSA = 2  (3 2 ) LSA = 18  in. 2

2. LATERAL AREA of a HEMISPHERE GEO188 Ex 1) Find the LSA (in terms of pi) of a hemisphere with a 7 ft. radius. TRY IT! 7 Answer on last slide. LSA hemisphere = 2  r 2

3. LATERAL AREA of a HEMISPHERE GEO188 Ex 2) Find the surface area of a hemisphere with a 10 cm radius. Use 3.14 for pi. TRY IT! 10 Answer on last slide. LSA hemisphere = 2  r 2

4. LATERAL AREA of a HEMISPHERE GEO188 Ex 1) LSA = 2  (7 2 ) SA = 98  ft 2 SA = 628 cm 2 SA = 2  (49) Ex 2) LSA = 2  (10 2 ) SA = 2(3.14)(100) ANSWERS! LSA hemisphere = 2  r 2