Answer:
A = 120 cm²
Step-by-step explanation:
The 4 part of the ratio relates to the height of triangle A , then
16 ÷ 4 = 4 cm ← value of 1 part of the ratio, then
5 parts = 5 × 4 cm = 20 cm
The area (A) of triangle B is calculated as
A = bh ( b is the base and h the height )
Here b = 12 and h = 20 , then
A = × 12 × 20 = 6 × 20 = 120 cm²
a) The <em>perimeter</em> function of the rectangle is .
b) The domain of the <em>perimeter </em>function is .
<h3>How to analysis the perimeter formula of a rectangle inside a parabola</h3>
a) The perimeter of a rectangle () is the sum of the lengths of its four sides:
(1)
If we know that and
, then the perimeter of the rectangle is represented by the following formula:
The <em>perimeter</em> function of the rectangle is .
b) The domain of the function is the set of values of associated to the function. After a quick inspection, we find that the domain of the <em>perimeter </em>function is
.
<h3>Remark</h3>
The statement is incomplete and poorly formatted. The correct form is described below:
<em>As shown at the right, rectangle ABCD has vertices C and D on the x-axis and vertices A and B on the part of the parabola </em><em> that is above the x-axis. a) Express the perimeter </em>
<em> of the rectangle as a function of the x-coordinate of A. b) What is the domain of the perimeter function?</em>
To learn more on rectangles, we kindly invite to check this verified question: brainly.com/question/10046743
