Step-by-step explanation:
Area is Hight × length
x + 3 = 3x
x + 3 = 3x
3x × 3x = 9x^2
I'm not sure but I think it might be this
Answer: 71 inches
Step-by-step explanation:
The area of the shape is 12 square units
<h3>Area of a trapezium</h3>
The given shape is a trapezium and the formula for calculating the area of a trapezium is expressed as:
A = 0.5(a+b)h
Given the following parameters
a = 2
b = 10
h = 2
Substituting the given parameters
A = 0.5(2+10)*2
A = 0.2(12) * 2
A = 12 square units
Hence the area of the shape is 12 square units
Learn more on area of trapezium here: brainly.com/question/16904048
Answer:

Step-by-step explanation:
l*w*h

It is the type of triangle, in which all the three sides are equal to each other.
Hope this helps!