4 years ago

Please help this is urgent

Mathematics

1 answer:

bezimeni [28]4 years ago

6 0

Answer: Radius: 1) from point H to point A and 2) from point H to point G

Diameter: 1) from point E to point A and 2) from point D to point G

Step-by-step explanation:

Radius is from the exact point of the middle of the circle until the circumference.

Diameter is a straight line passing from side to side through the center of the circle.

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3 years ago

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Solving radical equation

Darya [45]

$\bf \sqrt{k-9}-\sqrt{k}=-1\implies \sqrt{k-9}=\sqrt{k}-1\impliedby \textit{squaring both sides}
\\\\\\
(\sqrt{k-9})^2=(\sqrt{k}-1)^2\implies k-9=(\sqrt{k}-1)(\sqrt{k}-1)\impliedby \textit{FOIL}
\\\\\\
k-9=k-2\sqrt{k}+1\implies -10=-2\sqrt{k}\implies \cfrac{-10}{-2}=\sqrt{k}
\\\\\\
\sqrt{\cfrac{-10}{-2}}=k$