33 degrees, and the vertex angle is 73. Splitting 140 by 2 yields 70 degrees for each base angle.
Calculate Base Angles Isosceles Triangle Example
You set up the equation x + x + (x + 20) = 180. These matching sides create congruent angles opposite them, which are the base angles.
Angle Type Expression Value Vertex Angle x + 20 40° Base Angle 1 x 80° Base Angle 2 x 80° Algebraic Example Imagine the base angles are both labeled as x, and the vertex angle is described as x + 20. Working with Missing Angles Sometimes the vertex angle is not given, but the base angles are expressed as variables.
Calculate Base Angles Isosceles Triangle Example
This method is reliable for any isosceles triangle as long as the vertex angle is provided. Clarifying this ensures you apply the correct formula and avoid mixing up the angles during calculation.
More About How to find the base angles of an isosceles triangle
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More perspective on How to find the base angles of an isosceles triangle can make the topic easier to follow by connecting earlier points with a few simple takeaways.
