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20 degrees and the two equal angles will be 80 degrees each

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Q: What is the measure of a vertex angle of an isosceles triangle if the measure of an exterior at the base is 100 degrees?
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Related questions

What is the measure of the largest exterior angle of an isosceles right triangle?

135 degrees.


The exterior angle of a base angle in an isosceles triangle is 100 degrees What is the measure of the vertex angle?

20 degrees


An exterior angle at the base of an isosceles triangle measures 130 find the measure of the vertex angle?

80 degrees.


What is the measure of the largest exterior angle of an isosceles right angle?

A isosceles right angle triangle will have 2 equal interior angles of 45 degrees and 1 angle of 90 degrees with its largest exterior angle being 180 -45 = 135 degrees.


What is the measure of the base angles of an isosceles triangle whose vertex angle has a measure of 50 degrees?

130 degrees is the measure of the base angles of an isosceles triangle whose vertex has a measure of 50 degrees.


What is the name of the triangle that measure 110 35 and 35 degrees?

It is an isosceles triangle


What is an isosceles triangle measure up to?

In all triangles, the angles always measure up 180 degrees. In an isosceles triangle two of the angles are equal.


How do you determine that the isosceles triangle is an isosceles right triangle?

The three interior angles measure 45, 45 and 90 degrees.


The measure of an exterior angle of a triangle is120 degrees the interior angles that are not adjacent to this exterior angle are congruent find the measure of the interior angles of the triangle?

They are all 60 degrees.


What is the total angle measure of isosceles triangle?

The sum of all three interior angles of any triangle, isosceles or not, is 180 degrees.


What is the measure of the exterior angles in a triangle?

An exterior angle of a triangle can have a value between (but not including) 0 to 180 degrees.


If two angles of a triangle each measure 70 degrees what is the triangle is described as?

That's an isosceles triangle.