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11.04.2021 •
Mathematics
A circular plate has circumference of 30.1 inches. What is the area of this plate? Use 3.14 for pi
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Ответ:
Area of a circle=Πr²
Getting r from:
circumference of a circle=2Πr
30.1 =2(3.14)r
30.1 =6.28r
4.8 =r
Area=3.14(4.8)²
=3.14(23.04)
=72.3
Ответ:
104°
Opposite angles in a cyclic quadrilateral are supplementary.
7/2x + 20 + 3/2x + 40 = 180
x = 24
∠B = 7/2x + 20
∠B = 7/2(24) + 20 = 104