Question

1. a square has side length 20 m. find its area.

Explanation:

Step1: Recall area formula

The area formula for a square is $A = s^2$, where $s$ is the side - length.

Step2: Substitute side - length value

Given $s = 20$ m, substitute into the formula: $A=(20)^2$.

Step3: Calculate the result

$(20)^2=20\times20 = 400$ $m^{2}$.

Answer:

$400$ $m^{2}$