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On a piece of paper, use a protractor to construct a triangle with angle measures of 40° and 60º.

What is the measure of the third angle?

60°
80°
100°
180°

Respuesta :

wolf1728
All 3 triangle angles sum to 180 degrees.
So third angle = 180 -40 -60
third angle = 80 degrees

Considering that the sum of the measures of the internal angles of a triangle is of 180º, the third angle measures 80º.

A triangle is composed by three internal angles, and the sum of their measures is of 180º.

In this problem:

  • The first two angles have measures of 40º and 60º.
  • The third angle measures x.

Since the sum of the measures is of 180º:

[tex]x + 40 + 60 = 180[/tex]

[tex]x + 100 = 180[/tex]

[tex]x = 180 - 100[/tex]

[tex]x = 80[/tex]

The third angle measures 80º.

A similar problem is given at https://brainly.com/question/13387714

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