We have P = 3 x a (the formula of the perimeter); 26 = 3 x a ; we obtain a = 26/3;
Then, we have <span>the Pythagorean Theorem in one of two rectangular and congruent triangles :</span>
h² = a² - (a/2)² = a² - a²/4 = 4a²/4 - a²/4 =<span> 3a²/4</span>
It follows that
h = √(3a²/4) = a√3/2 ≈ 0,866*a ≈ 7,5 centimeter.
The property in the expression 4 + (x + y) = (4 + x) + y is Commutative property.
<h3>What is the number?</h3>
A number is a mathematical entity that can be used to count, measure, or name things. For example, 1, 2, 56, etc. are the numbers.
It is given that:
4 + (x + y) = (4 + x) + y
As we know,
Commutative property is the property in which we can arrange the terms withouth changing the sign.
For an example:
a + b = b + c
In the given expression
4 + (x + y) = (4 + x) + y
The Commutative property is applied to rearrange the terms.
Thus, the property in the expression 4 + (x + y) = (4 + x) + y is Commutative property.
Learn more about the number here:
brainly.com/question/17429689
#SPJ1
Step-by-step explanation:
Question 46.
Answer: E. None of these.
Question 47.
Answer: E. None of these.
The answer is -25 i just took the test/quiz
