The equation that correctly represents the relationship between a, b, and c in the triangle is c² = a² + b² - 2ab cos(90)
What is an equation?
An equation is an expression that shows the relationship between two or more numbers and variables.
Cosine rule is used to show the relationship between the sides and angles of a triangle. It is given by:
c² = a² + b² - 2abcosC
Where a, b and c are the sides, while C is the angle opposite to side c.
In the triangle ABC, C = 90°, hence:
c² = a² + b² - 2ab cos(90)
The equation that correctly represents the relationship between a, b, and c in the triangle is c² = a² + b² - 2ab cos(90)
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