Question

What is the average (arithmetic mean) in degrees of the internal angles in a rectangle?

• A. $45$
• B. $90$
• C. $180$
• D. $75$
• E. $360$

Answer 1

Answer: (B)

We know, internal angles of a rectangle are $90$ degrees.

A rectangle has $4$ sides, so sum of all angles will be
${90}^o+{90}^o+{90}^o+{90}^o={360}^o$.

We know, Mean is given by,

$\text{Mean}=\frac{\text{Sum of the elements}}{\text{Total number of elements}}$.

Therefore, required arithmetic mean of angles in degree will be $\frac{360}{4}=90$.

Hence, option $C$ is correct.