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belka [17]
4 years ago
10

Whenever 2 line or intersect at 90 the 2 lines are said to be ?

Mathematics
2 answers:
Sedaia [141]4 years ago
7 0
Two lines that intersect at 90 degrees are considered perpendicular to each other.

Lelechka [254]4 years ago
5 0
Perpendicular to each other.
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Answer:

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\textsf{Area of a circle}=\pi r^2 \quad \textsf{(where r is the radius)}

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Substitute the given value into the formula and solve for r:

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\implies \dfrac{80 \pi}{\pi} = \dfrac{\pi r^2}{\pi}

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\implies \sqrt{r^2}=\sqrt{80}

\implies r=\sqrt{80}

\implies r=\sqrt{16 \cdot 5}

\implies r=\sqrt{16}\sqrt{5}

\implies r=\sqrt{4^2}\sqrt{5}

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