Answer:
Assuming the formula below, the answer is:

Explanation:
I can teach you how to <em>make r the subject of a formula</em>, with an example.
Other similar question asks to make r the subject of this formula:

<u>1. Apply multiplication property of the equalities: muliply both sides of the equality by r</u>
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<u>2. Apply distributive property on the right side</u>

<u>3. Addition property: ad 12r to both sides</u>

<u>4. Common factor r on the left side</u>

<u>5. Division property of equalities: divide both sides by 12 + t</u>

Answer:
Step-by-step explanation:
Good evening ,
Look at the photo below for the answer.
Answer:
I think it would be true.
Answer:
Ф = the measure of ∠BAC in radians
Step-by-step explanation:
∵ ∠BAC is a central angle
∴ The are of the sector will depended on the length of the radius <em>r </em>and the measure of the central angle <em>Ф</em>
If the measure of Ф in degrees
∴ The area of the sector = Ф°/360° (π r²)
If the measure of Ф in radians
∴ The area of the sector = 1/2 r² Ф
When to change from degree to radian you do that
Ф radian = Ф°/180 × π
∴ Ф/360 π r² = 1/2 <u>(Ф/180 π)</u> r² ⇒ ∵ underline is Ф radian
∴ Area sector = 1/2 r² Ф ⇒ Ф in radians