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Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

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Section
BuyFindarrow_forward

Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085
Textbook Problem

In Exercises 11 to 14 , assume that X , Y , and Z are midpoints of the sides of R S T .

If the perimeter (sum of the lengths of all three sides) of X Y Z is 12.7, what is the perimeter of R S T ?

To determine

To find:

The perimeter of the RST.

Explanation

Approach:

The line segment that joins the midpoints of two sides of a triangle is parallel to the third side and has a length equal to one half the length of the third side.

Calculation:

Given,

The perimeter of XYZ=12.7 units.

X, Y, Z are the midpoints of the sides of RST

By the application of the ‘theorem the line segment that joins the midpoints of two sides of a triangle is parallel to the third side and has a length equal to one half the length of the third side’, we have

XY=12RT

Multiply; by 2 on both sides,

2XY=2·12

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