Q:

The height of a triangle is 4 sqrt 3 . What is the perimeter of the equatorial triangle?

Accepted Solution

A:
The perimeter of the equatorial triangle is 24 unitsSolution:Given that,An equilateral triangle has an height equal to [tex]4 \sqrt{3}[/tex]The triangle is shown belowFrom Triangle ABC in the shown figure AD [tex]=4 \sqrt{3}[/tex]Let the sides of the equilateral triangle be β€˜a’AB = BC = aSince, it is an equilateral triangle we get,BD = DC = a Γ· 2 Now, using Pythagoras Theorem in Triangle ABD,The Pythagorean theorem is this: In a right triangle, the sum of the squares of the lengths of the two legs is equal to the square of the length of the hypotenuse.[tex]\mathrm{AB}^{2}=\mathrm{BD}^{2}+\mathrm{AD}^{2}[/tex][tex]\begin{array}{l}{a^{2}=\left(\frac{a}{2}\right)^{2}+(4 \sqrt{3})^{2}} \\\\ {a^{2}-\left(\frac{a}{2}\right)^{2}=(4 \sqrt{3})^{2}}\end{array}[/tex][tex]\frac{4 a^{2}-a^{2}}{4}=16 \times 3[/tex][tex]\begin{array}{l}{\frac{3 a^{2}}{4}=16 \times 3} \\\\ {3 a^{2}=192} \\\\ {a^{2}=192 \div 3=64}\end{array}[/tex]a = 8Hence, the three sides of the triangle are 8 units eachIn equilateral traingle, length of all three sides of triangle are equalSo, Perimeter = 3 [tex]\times[/tex] (Length of each side of triangle) Perimeter = 3 [tex]\times[/tex] 8 = 24Thus the perimeter of the equatorial triangle is 24 units