document.write( "Question 32980This question is from textbook amsco's mathematics A
\n" ); document.write( ": If each base angle of an isoceles triangle measures 55degrees,find the measure of the vertex angle of the triangle \n" ); document.write( "

Algebra.Com's Answer #19423 by sarah_adam(201) $\"\"$ $\"About$

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One of Euclid's theorems is that the base angles of an isosceles triangle are congruent (equal). An isosceles triangle is a triangle in which two of the sides are conguent (equal). The base angles are the angles opposite the two congruent sides. \r
\n" ); document.write( "\n" ); document.write( "in triangle ABC if angle B and Angle C are base angles and Angle A is the vertex angle\r
\n" ); document.write( "\n" ); document.write( "so here angle B= ANgle C = 55degress
\n" ); document.write( "we know sum of angles in triangle are 180 degreess
\n" ); document.write( "therfore Angle A + Angle B +Angle C = 180 degrees
\n" ); document.write( "Angle A +55+55 = 180
\n" ); document.write( "Angle A = 180 - 110
\n" ); document.write( "Angle A = 70 degrees \n" ); document.write( "

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