Posted by vincent on Saturday, August 3, 2013 at 10:46am.
Find the vertex angle of an isosceles triangle if it exceeds each base angle by 30 degree.

math  Steve, Saturday, August 3, 2013 at 2:19pm
since the two base angles are equal, if each is x, then
x+30 + x + x = 180
3x = 150
x = 50
So, the vertex angle is 80
Answer This Question
Related Questions
 corollary to isosceles triangle theorem  how to prove 1)the measure of each ...
 Geometry  An exterior angle of an isosceles triangle has measure 150°. Find two...
 vertex angle  The three angles add to 180 degrees. Also , the two base angles ...
 Geometry  What is the measure of the complement of a 67 degree angle? The ...
 math  An isosceles triangle has a base of 20 cm. The vertex angle is 82 . Find ...
 Math (Triangles)  The vertex angle of an isosceles triangle is 40°20'. Each of ...
 Geometry Question (multiple choice)!  The isosceles trapezoid is part of an ...
 geometry  6. The isosceles trapezoid is part of an isosceles triangle with a 34...
 trig  Find the altitude of an isosceles triangle whose base in 30 cm vertex ...
 geometry  In an isosceles triangle, the measure of the vertex angle is 4x. The...
More Related Questions