3). Find the AREA of these circles:

a). RADIUS (R) = 9 in. A = ________ |
b). RADIUS (R) = 3 feet A = ________ |

c). RADIUS (R) = 4.8 cm. A = ________ |
d). DIAMETER (D) = 12 feet (Hint: use this D to find the radius) A = ________ |

a). A = __________ |
b). A = __________ |

c). A = __________ |
d). A = __________ |

e). Find the area of this half circle: A = __________ |