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 ...
- 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 (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...
- algebra - Find the vertex angle of an isosceles triangle with base angles of (...
- Math-CHECK PLEASE - Which of the statements is ALWAYS TRUE? A-A right triangle ...

More Related Questions