   Chapter 5.CT, Problem 11CT Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

Solutions

Chapter
Section Elementary Geometry For College St...

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

In △ D E F ,   ∠ D is a right angle and m ∠ F = 30 ° . a) Find DE if EF = 10m.b) Find EF if D F = 6 3 ft. To determine

a)

To find:

The value of DE.

Explanation

Given, In DEF,D is a right angle and mF=30°

Hypotenuse EF=10m.

We know that the sum of the angles of the triangle =180°

From, DEF,

F+D+E=180°

30°+90°+E=180°

E=180°-120°

E=60°

Therefore, the angles in the triangle are 30°,60° and 90°

To determine

b)

To find:

The value of EF.

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