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3 years ago

Solve the formula for the indicated variable. A = 4πr² for r when r > 0 r =

Mathematics

2 answers:

SashulF [63]3 years ago

8 0

Answer:

√(A/4π) = r

Step-by-step explanation:

A = 4πr²

r² = A/4π

r = √(A/4π)

77julia77 [94]3 years ago

4 0

Answer:

r = $\sqrt{\frac{A}{4\pi } }$

Step-by-step explanation:

Given

A = 4πr² ( isolate r² by dividing both sides by 4π )

r² = $\frac{A}{4\pi }$

Take the square root of both sides

r = $\sqrt{\frac{A}{4\pi } }$

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3 years ago

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3 years ago

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Copy the problems onto your paper, mark the givens and prove the statements asked. Given: ∠BTO ≅ ∠IWE WI ≅ BT , OW ≅ ET Prove: △

Varvara68 [4.7K]

Answer:

$\triangle BOT \cong \triangle IEW$

Step-by-step explanation:

We are given the following in the question:

$\angle BTO \cong \angle IWE\\WI \cong BT\\OT \cong EW$

We have to prove:

$\triangle BOT \cong \triangle IEW$

Proof:

$\text{In }\triangle BOT \text{ and } \triangle IEW$

we can write:

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Hence, the two triangle are congruent by SAS congruency rule.

$\triangle BOT \cong \triangle IEW$

The attached image shows the two triangle.

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3 years ago

A student takes 1/6 hour to paint a picture frame. How many picture frames can the student paint in 4 hours

Sergeeva-Olga [200]

Answer:

24 picture frames

Step-by-step explanation:

Since a student takes 1/6 hour to paint a picture frame, so in an hour, the student will paint a total of 6 picture frames. So to find the number of picture frames in 4 hours, you just need to multiply 4*6 to get 24 picture frames.

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Answer:

Step-by-step explanation:

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$48/2=24$

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3 years ago