Answer:
Yes
Step-by-step explanation:
We can use the Pythagorean Theorem to check if this triangle is a right triangle:

Note that
and
are the legs of the triangle and
is the hypotenuse:
Substitute the lengths of the sides into the equation:


Therefore this triangle is a right triangle.
Answer:
54 cm²
Step-by-step explanation:
Area of a Rectangle Formula: A = lw
We are given 18 as <em>l</em> and 3 as <em>w</em>, so simply plug it into the formula:
A = 18(3)
A = 54
Answer:3.42
Step-by-step explanation:to get the answer to a area equation you need to multiply the length by the width.