Question

a fence is being built for a triangular plot of land. how much fence is needed? enter the answer. 20 ft 21 ft blank feet

Explanation:

Step1: Identify triangle type

It's a right triangle with legs 20 ft and 21 ft.

Step2: Find hypotenuse

Use Pythagorean theorem: $c = \sqrt{a^2 + b^2}$, where $a = 20$, $b = 21$.
$c = \sqrt{20^2 + 21^2} = \sqrt{400 + 441} = \sqrt{841} = 29$ ft.

Step3: Calculate perimeter

Perimeter = sum of all sides: $20 + 21 + 29 = 70$ ft.

Answer:

70