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Yes, because all of the other 4 angles are also equal.

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Q: Are isosceles triangles with a 40 degree vertex angle similar?
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Related questions

What are two isosceles triangles with congruent vertex angles?

They're similar triangles.


If the vertex angles of two isosceles triangles are congruent are the triangles always similar?

Yes, they are.


What does Isosceles Triangle and Equilateral Triangle have that is different?

Equilateral triangles have 3 equal sides, but isosceles only have two equal sides. Also, equilateral triangles have three 60° angles. Isosceles triangles have two congruent base angles and a vertex angle.


Will perpendicular bisectors that originate at the base of isosceles triangles pass through the vertex of the triangle?

Yes.


Lmn and opn are isosceles triangles lmn and opn share vertex n?

Lo/on = 2/3


Does the angle bisector of the vertex angle of an isosceles triangle divides the triangle into two congruent?

Only if the vertex angle being bisected is between the sides of equal length will the result be two congruent triangles.


How is an isosceles trapezoid related to an isoceles triangle?

If the sloped sides of an isosceles trapezium are extended to a vertex, you would get an isosceles triangle.If the sloped sides of an isosceles trapezium are extended to a vertex, you would get an isosceles triangle.If the sloped sides of an isosceles trapezium are extended to a vertex, you would get an isosceles triangle.If the sloped sides of an isosceles trapezium are extended to a vertex, you would get an isosceles triangle.


What is the name of the angle of the isosceles triangle?

i guess they have the two same base angles and one vertex angle, the same for other triangles i guess


What is the measure of the vertex angle of an isosceles triangle with base angles measuring 30 degree?

120 degrees.


If the base angles of an isosceles triangle are each 27 the what is the vertex?

If the two base angles of an isosceles triangle are both 27 degrees then the vertex angle is 126 degrees because the sum of a triangles angles is always 180 degrees, 27 and 27 is 54, 180-54 is 126.


Aside from the vertex the horizontal cross-sectional shapes of this pyramid are all similar triangles?

FALSE


What are the properties of a pyramid?

A square pyramid (the most common) has a square base with 4 isosceles triangles on each side that come to one point called a vertex.