PrepareChange of Subject of Formula · 3 min read
Introduction
Introduction to Change of Subject of Formula
The subject of a formula is the main letter we are trying to find in a math sentence.
Subject of a formula is the variable that is being worked out.
It is like the leader of the equation that stays alone on one side.
It can be recognized as the letter on its own on one side of the equals sign.
Examples
In the formula for the area of a rectangle A = bh (area = base x height), the subject of the formula is A.
If x = 2y + 0, x is the subject of the formula.
Given P = 2(a + b), P is the subject of the formula.
Key points
- •The subject of a formula is the variable isolated on one side of the equals sign.
- •It represents the quantity being calculated or 'worked out' by the formula.
- •In A = bh, 'A' is the subject because it stands alone on the left side.
- •In x = 2y + 0, 'x' is the subject as it is isolated.