HELP me with These questions 2

Question

asked Jun 4, 2019 187k views

1 Answer

Donald Zhu · Answer 1 · 2019-06-11T12:58:10+0000

Answer: 4

Explanation:

A =
(1)/(2) r²θ

50 =
(1)/(2) (5)²θ

100 = (5)²θ

100 = (25)θ

4 = θ

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Answer: 1570.80 cm²

Explanation:

A =
(1)/(2) r²θ

A =
(1)/(2) (100)²
$((\pi)/(10))$

A = 500π

A = 1570.80

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Answer: 19.63 m²

Explanation:

A =
(1)/(2) r²θ

=
(1)/(2) (5)²
$(\frac{\pi} {2})$

=
$\frac{25\pi} {4}$

= 19.63

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Answer: 15°

Explanation:

$(\pi )/(180) = \frac{\pi} {12x}$

180 = 12x

15 = x

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Answer: A

Explanation:

Quadrant I: 0° - 90°

Quadrant II: 90° - 180°

Quadrant III: 180° - 270°

Quadrant IV: 270° - 360°

255° is in Quadrant III