Thread: Two 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.

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.