Question about Mathsoft StudyWorks! Middle School Deluxe Math 5.0 (11543) for PC

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How to find the perimeter of an equilateral triangle.

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Take the measurement of one side and multiply it by 3.

Posted on Dec 05, 2014

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What is the length of one side of an equilateral triangle that has a perimeter of 15 3/4 feet?


15 3/4 =3*S (S the length of a side)
S= (15 3/4) / 3 = =5 1/4
Please use improper fractions. It is safer.

Sep 26, 2014 | Computers & Internet

1 Answer

What is an Equilateral Isosceles triangle?


A contradiction is what. An equilateral triangle has 3 equal sides, and therefore equal angles. An isosceles triangle has 2 equal sides and one shorter or longer..

Apr 22, 2014 | Computers & Internet

2 Answers

How can you classify a triangle according to it angle? is there a formula for it


Well, there is classification by sides, equilateral with 3 equal sides, Isosceles with two equal sides, and scalene with no equal sides, but you talk about angles, but I wanted to point out equilaterals have 3 equal angles, isoceles have 2 equal angles and scalene have no equal angles.
So, now we talk about angles: a Right trianlge has one angle that is 90 degrees, an Obtuse triangle has one angle greater than 90 degrees, and an Acute has no angles over 90 degrees.
Thus, it is possible to have a (scalene or isoceles) AND (acute, obtuse, or right) triangle, but never an equilateral AND (obtuse or right). The angles can't be equal and 90+ degrees if all three must equal 180 degrees.

Oct 06, 2012 | Mathsoft StudyWorks! Middle School Deluxe...

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What is the side of an equilateral triangle if its area is root 243/4 sq cm.


Assuming you are specifying Area = sqrt(243/4) = 7.79422 Then the sides of the equilateral triangle are: 4.24264
Source: http://www.calculatorsoup.com/calculators/geometry-plane/triangles-equilateral.php
Best, Hunter

Mar 02, 2011 | Google Chrome

1 Answer

The height of equilateral triangle is 7root3cm find its perimeter


Let ABC be the equilateral triangle,
and PC be the line joining the mid point of A and C.
We know that equilateral triangle has equal angles which means

Now,
in triangle AHC
Sin(THETA) = AH/AC

That is...
Sin(60) = (7root3)/AC

or AC = (7root3)/Sin(60)

AC=14

Perimeter of equilateral triangle ABC = 3 x Side
= 3 x 14
= 42

Sep 03, 2010 | Computers & Internet

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There is an equilateral triangle. in it there are three coins of equal radius is placed. find the radius of the coin.


how big is the triangle? if the coins are a mile in diameter doesnt mean you cant have an equilateral triangle with legs of 32 miles long.

or are you asking for the equation?

i will send you on the path to the equation.

if you draw a circle on a piece of paper then draw a triangle around it where is the center? if the triangle were a perfect equilateral then the circle would be a perfect circle touching the sides of the triangle.

its important to know where the center is because the center of the circle to the edge of the circle is the radius.

so the center of a triangle is the center of the circle. therfeore the radius of the circle will equal hieght/2...

thinking that way you can say that if there were three coins then the center of the triangle cant be occupied by a coin but is very close to an edge. where is the center of the coin?

Jun 10, 2010 | Mathsoft StudyWorks! Middle School Deluxe...

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