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antiseptic1488 [7]
3 years ago
13

Triangle ABC is an equilateral triangle with side lengths of 10 inches.

Mathematics
2 answers:
nikklg [1K]3 years ago
7 0
The height of an equilateral triangle is found by the formula:
height = (sq root (3) / 2 ) * side length
height = ( <span> <span> <span> 1.7320508076  </span> </span> </span> / 2) * 10
height = (  <span> </span> <span> <span> <span> 0.8660254038 </span> </span> </span> ) * 10
height = <span>8.660254038 inches     


</span>
azamat3 years ago
6 0
(sq root (3) / 2 ) * 10 ( <span>1.7320508076  </span>/ 2) * 10 (  <span>0.8660254038 </span>) * 10
height = <span>8.660254038 inches      
</span>
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Pentagon ABCDE and pentagon A″B″C″D″E″ are shown on the coordinate plane below:
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The transformations that are applied to pentagon ABCDE to create A"B"C"D"E" are:

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2) Reflection across the x-axis (x, y) → (x, -y)

So, the overall transformation given in the graph is (x, y) → {(x + 8), -(y + 2)}.

<h3>What are the transformation rules?</h3>

The transformation rules are:

  • Reflection across x-axis: (x, y) → (x, -y)
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<h3>Calculation:</h3>

The pentagons in the graph have vertices as

For the pentagon ABCDE: A(-4, 5), B(-6, 4), C(-5, 1), D(-2, 2), and (-2, 4)

For the pentagon A"B"C"D"E": A"(4, -7), B"(2, -6), C"(3, -3), D"(6, -4), and E"(6, -6)

Consider the vertices A(-4, 5) from the pentagon ABCDE and A"(4, -7) from the pentagon A"B"C"D"E".

Applying the Translation rule for the pentagon ABCDE:

The rule is (x, y) → (x + a, y + b)

So, the variation is

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5 + b = 7

⇒ b = 7 - 5 = 2

So, the pentagon ABCDE is translated by (x + 8, y + 2).

Applying the Reflection rule for the translated pentagon:

The translated pentagon has vertices (x + 8, y + 2).

When applying the reflection across the x-axis,

(x + 8, y + 2) → {(x + 8), -(y + 2)}

Therefore, the complete transformation of the pentagon ABCDE to the pentagon A"B"C"D"E" is (x, y) → {(x + 8), -(y + 2)}

Verification:

A(-4, 5) → ((-4 + 8), -(5 + 2)) = (4, -7)A"

B(-6, 4) → ((-6 + 8), -(4 + 2)) = (2, -6)B"

C(-5, 1) → ((-5 + 8), -(1 + 2)) = (3, -3)C"

D(-2, 2) → ((-2 + 8), -(2 + 2)) = (6, -4)D"

E(-2, 4) → ((-2 + 8), -(4 + 2)) = (6, -6)E"

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