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90° . That's true of any triangle. Doesn't have to be isosceles.

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Q: Half the sum of degree-measures of the angles of an isosceles triangle is?
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What is the measure of an acute base angle of the trapezoid of an isosceles triangle vertex of 46 degrees?

For an isosceles triangle with vertex 46 degrees, the sum of the remaining two base angles is 180-46 = 134 degrees. Base angles are equal because it's isosceles, so each angle is half of their sum. 134/2 = 67 degrees. Thus, any isosceles trapezoid formed inside that isosceles triangle by drawing parallel lines to the triangle's base, will have base angle measures of 67 degrees, which are triangle's base angles.


What is half of an isosceles triangle?

Depending how you halve it can be a right angle triangle or an isosceles trapezoid


If two angle bisectors of a triangle are congruent then prove that triangle is isosceles?

If two angle bisectors of a triangle are congruent, then the triangle is isosceles. This is because the angle bisectors of a triangle are concurrent and the angle bisectors of a triangle that are congruent divide the opposite sides of the triangle into two equal segments. So if two angle bisectors are congruent, the sides opposite those angles are also equal, making the triangle isosceles.


Can an Isosceles triangles may be obtuse or acute but never right?

Not true. A triangle with angles of 90, 45 and 45 is a right angled isosceles triangle. If you take a square piece of paper and fold it in half - from corner to corner - you will get this shape.


What is the base angles of an isosceles triangle?

you need the apex angle, call it n. Each base angle is one-half of (180 - n)


How do you draw a isosceles trapezium?

Its like an isosceles triangle that has been cut in half parrllel to its base


What type of triangle is made by cutting a square diagonally in half?

A right angle triangle or an isosceles triangle.


How many unique triangles can be made when one angle measures 90 and deg and another angle is half that measure?

The triangle will then have 3 angles of 45, 45 and 90 degrees and take the shape of an isosceles right angle triangle.


Which triangle has two equal sides anad a 90 degree angle?

An isosceles right triangle. Each of the acute angles is 45 degrees. The legs are equal, and each leg is sqrt(2) times half of the length of the hypotenuse.


Which regular polygon's interior angles are half that of its exterior angles?

An equilateral triangle.


An isosceles triangle with congruent sides of 16.2 cm and a third side half that length what's the perimeter?

Perimeter of the isosceles triangle: 16.2+16.2+8.1 = 40.5 cm


What is the area of an isosceles triangle?

It depends on the size of the triangle.It is half the base times height.