Find the missing angle measure in ABC. A = 118°, B = 23°, C = ____°

Mathematics

1 answer:

Sladkaya [172]3 years ago

7 0

118 + 23 = 141

180 = Triangle

180 - 141 = 39

39 is the answer

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Mkey [24]

Area of semicircle = 1/2 the area of a circle:
$A_{sc}=\frac{1}{2} \pi r^{2}$
radius is half the diameter of 6ft.
$A_{sc} = \frac{1}{2} \pi (3^{2} )=14.13 ft^{2} .$
Area of the rectangle:
$A_{r} =lw=15*6=90 ft^{2} .$
Add the two together:
90 + 14.13 = 104.13
Round to the nearest tenth (one decimal place)
Area = 104.1 square feet.

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