What is the area of a regular pentagon with a side length of 9 millimeters and an apothem length of 6.2 millimeters?

1 answer:

5 0

A Pentagon can be broken up into 5 equal triangles. Area of the Pentagon is the sum of all the 5 triangles.

Area of the pentagon = 5 ( 1/2 x 6.2 x 9) = 139.5 mm²

Answer: 129.5 mm² (Answer D)

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Step-by-step explanation:

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2 years ago

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Vaselesa [24]

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General Formulas and Concepts:

<u>Calculus</u>

Differentiation

Derivatives
Derivative Notation

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Basic Power Rule:

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<em>Identify</em>

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<u>Step 2: Differentiate</u>

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Topic: AP Calculus AB/BC (Calculus I/I + II)

Unit: Differentiation

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<h2><u>Diagram</u><u>:</u><u>-</u></h2>

$\setlength{\unitlength}{1 cm}\begin{picture}(20,15)\thicklines\qbezier(1,1)(1,1)(6,1)\qbezier(1,1)(1,1)(1.6,4)\qbezier(1.6,4)(1.6,4)(6.6,4)\qbezier(6,1)(6,1)(6.6,4)\qbezier(6.6,4)(6.6,4)(1,1)\qbezier(1.6,4)(1.6,4)(6,1)\put(0.7,0.5){\sf A}\put(6,0.5){\sf B}\put(1.4,4.3){\sf D}\put(6.6,4.3){\sf C}\end{picture}$