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Because the 3 interior angles of any triangle add up to 180 degrees.

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8y ago

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How do you figure the angle of a triangle?

Get a...PROTRACTOR!


How do you figure the sum of angels of an isosceles trapezoid without a protractor?

The sum of all the interior angles of any trapezoid is 360 degrees.


How do you figure miles?

with a protractor


How do you figure out value of vertical angle?

Using a protractor will help but in general vertical angles on a straight line add up to 180 degrees.


How do you measure angles with out a protractor?

You could estimate. If it is not right, it is between 90 degrees and 0 degrees. If it is between right and straight angles, it would be between 90 degrees and 180 degrees. You can sort of figure out roughly where each and measurement was.


What 3 dimensional figure is formed by continually rotating a right triangle 360 degrees?

the answer is cone


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An isosceles triangle.


How do you figure out the perimeter for a triangle when you only have one length?

Without knowing any other property of that triangle, you can't.


Angles that add up to 180?

If all of the angles add to 180 degrees the figure is a triangle. * * * * * That is if they form a plane figure. Angles that add to 1890 degrees are called supplementary angles.


What can i not use when constructing a figure?

Measuring tools: Ruler or Protractor .


Will the sides of the triangle change if rotate a figure 90 degrees clockwise about origin?

No, only their positions will change.


What is the sum of the angles in a quadrangle without using a protractor?

If, by quadrangle, you mean quadrilateral (four sided figure), than the angles add to 360 degrees. You can figure out the degree measure for any sided figure by simply letting the number of sides equal the variable n, and using the equation 180(n-2) (one hundred eighty times n minus 2). This works for any figure.