Answer:
A=πr(r+h2+r2)
Step-by-step explanation:
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The total length of a boundary defines the perimeter of an equilateral triangle.
<h3>What is the Perimeter of an Equilateral Triangle?</h3>
- The total of the three sides makes up the perimeter of an equilateral triangle.
- The following fundamental characteristics define a triangle as being equilateral:
- The three sides are equal.
- There is a 60° angle between all three.
- The sides of the triangle PQ = QR = RP in the following illustration have equal lengths.
- The triangle's angles are also equal in addition to this. An equilateral triangle is what this is.
- An equilateral triangle's perimeter is now equal to 3a, where a denotes one of the triangle's sides.
- Perimeter of Equilateral Triangle Formula : P = 3a, where 'a' stands for one of the triangle's sides, is a simple formula for calculating an equilateral triangle's perimeter. An equilateral triangle has three equal sides, hence the sum is equal to three equal sides, or 3a.
- Additional equilateral triangle formulas include the following: When we need to determine a triangle's height from its sides, we can apply the following formula: Equilateral Triangle Height = (3a)/2
- The semi-perimeter of an equilateral triangle must be determined in a few situations. Half of a perimeter, or semi-perimeter, is equal to 3a/2, which is derived using the formula semi-perimeter = (a + a + a)/2.
To Learn more About equilateral triangle refer to:
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<em><u>The numbers are ordered from greatest to least is:</u></em>

<em><u>Solution:</u></em>
<em><u>Given numbers are:</u></em>

We have to order them from greatest to least
Let us first convert the mixed fractions number to decimals
Mixed fractions to fractions:
Multiply the whole number part by the fraction's denominator.
Add that to the numerator.
Then write the result on top of the denominator.
Therefore,

Similarly,

<em><u>Now the given numbers are:</u></em>
7.875, 7.5, 7.8, 7.75
<em><u>Arrange them from greatest to smallest</u></em>
7.875 > 7.8 > 7.75 > 7.5
<em><u>Thus the order is:</u></em>

Thus the numbers are ordered from greatest to least
Answer:
4
Step-by-step explanation: