# Video: AQA GCSE Mathematics Foundation Tier Pack 4 β’ Paper 2 β’ Question 2

The value of π is the square of the value of π. Circle the correct formula. [A] π = πΒ² [B] π = 2π [C] π = πΒ² [D] π = βπ.

02:19

### Video Transcript

The value of π is the square of the value of π. Circle the correct formula. Is it π equals π squared, π equals two π, π equals π squared, or π equals the square root of π.

As the question states, the value of π is our formula must start π equals. The word βisβ in mathematics means equals. Weβre told that π is the square of π. Squaring something means multiplying it by itself. Therefore, π is equal to π multiplied by π. This can be written as π is equal to π squared. Any term multiplied by itself is the same as that term squared. If π is the square of the value of π, the correct formula is π equals π squared.

The first incorrect answer has the variables the wrong way round. π is equal to π squared. This means that π is the square of the value of π. The second incorrect answer states that π is equal to two π. This means π is equal to two multiplied by π. This would also be the simplified version of π equals π plus π as π plus π is equal to two π. The third incorrect answer states that π is equal to the square root of π.

The first and last formula are actually both the same. If we squared both sides of the last formula, we would get π squared is equal to the square root of π squared. As squaring and square rooting are inverse or the opposite of each other, the right-hand side just becomes π. This leaves us with π is equal to π squared, which is the same as the first formula.

None of these three answers are the correct formula if π is the square of the value of π.