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4 years ago

8

Type a counter-example for the following conclusion. 5 > 0, 6 > 0, 12 > 0, 16 > 0, 20 > 0, 100 > 0. Conclusion

: All numbers are greater than 0.

1 answer:

Yanka [14]4 years ago

3 0

-5 < 0
-6 < 0
-12 < 0
If you want to get really theoretical, think about imaginary numbers! Like 5i

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The circle below has center O, and its radius is 4 ft. Given that m ZAOB=50°find the length of the minor arc AB.

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Answer:

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Step-by-step explanation:

The formula of the length of an arc in a circle is L = $\frac{\alpha }{360}$ × 2πr, where α is the central angle subtended by the arc, and r is the radius of the circle

∵ The radius of the circle is 4 ft

∴ r = 4

∵ ∠AOB is a central angle subtended by minor arc AB

∵ m∠AOB = 50°

∴ α = 50°

Substitute the values of r and α in the rule above

∵ L = $\frac{50}{360}$ × 2π(4)

∴ L = $\frac{10}{9}$ π

∴ The length of minor arc AB is $\frac{10}{9}$ π ft

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