# Khan/khan-exercises

…n exact answer.
1 parent 725121f commit fe2cb56c3fc9992ae401059418f4db632e1c4039 shanem committed Feb 24, 2013
Showing with 6 additions and 6 deletions.
1. +6 −6 exercises/area_of_a_circle.html
12 exercises/area_of_a_circle.html
 @@ -61,7 +61,7 @@
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Suppose the radius of a circle is \color{R_COLOR}{R}. What is its area?

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Suppose the radius of a circle is \color{R_COLOR}{R}. What is its exact area?

Math.PI * R * R
@@ -88,7 +88,7 @@
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Suppose the area of a circle is \color{K_COLOR}{R === 1 ? "" : R * R\pi}. What is its radius?

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Suppose the area of a circle is \color{K_COLOR}{R === 1 ? "" : R * R\pi}. What is its exact radius?

R
@@ -115,7 +115,7 @@
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Suppose the diameter of a circle is \color{D_COLOR}{2 * R}. What is its area?

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Suppose the diameter of a circle is \color{D_COLOR}{2 * R}. What is its exact area?

Math.PI * R * R
@@ -143,7 +143,7 @@
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Suppose the area of a circle is \color{K_COLOR}{R === 1 ? "" : R * R\pi}. What is its diameter?

+

Suppose the area of a circle is \color{K_COLOR}{R === 1 ? "" : R * R\pi}. What is its exact diameter?

2 * R
@@ -171,7 +171,7 @@
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Suppose the circumference of a circle is \color{C_COLOR}{2 * R\pi}. What is its area?

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Suppose the circumference of a circle is \color{C_COLOR}{2 * R\pi}. What is its exact area?

Math.PI * R * R
@@ -199,7 +199,7 @@
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Suppose the area of a circle is \color{K_COLOR}{R === 1 ? "" : R * R\pi}. What is its circumference?

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Suppose the area of a circle is \color{K_COLOR}{R === 1 ? "" : R * R\pi}. What is its exact circumference?

Math.PI * 2 * R

#### 4 comments on commit fe2cb56

commented on fe2cb56 Feb 25, 2013

@cbhl @spicyj I'm tempted to revert this because we always expect an exact answer unless we specifically state the answer should be rounded (counterexamples are bugs). Stating that this question expects an exact answer could cause confusion about what's expected for questions that don't explicitly say "exact".

commented on fe2cb56 Feb 25, 2013

+1

commented on fe2cb56 Feb 25, 2013

Sounds good to me.

commented on fe2cb56 Feb 25, 2013

... and it's done.