1) The ratio of three angles of a triangle area 3:4:5. Find the angles.

2) In an isoceles triangle, the vertex angle is one-half each base angle. Find the angles of the triangle.

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- Aug 15th 2009, 08:54 AMVoluntarius DiscoTwo Geometry Problems
1) The ratio of three angles of a triangle area 3:4:5. Find the angles.

2) In an isoceles triangle, the vertex angle is one-half each base angle. Find the angles of the triangle. - Aug 15th 2009, 09:36 AMMatt Westwood
1 Total of angles in a triangle is 180 degrees.

Now 3 + 4 + 5 = 12, so the angles are 3/12 x 180, 4/12 x 180 and 5/12 x 180.

You should be able to work it out from there.

2. Translating into algebra:

2a + b = 180

a = 2b

take it from there.