In an isosceles triangle, if the vertex angle is twice the sum of the base angles, calculate the angles of the triangle.

In an isosceles triangle, if the vertex angle is twice the sum of the base angles, then the measure of vertex angle of the triangle is (a) 100^0 (b) 120^0 (c) 110^0 (d) 130^0

The vertical angle of an isosceles triangle is twice the sum if its base angles. Find each angle of the triangle.

Solve the following:(a) The teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest score is 87. What is the lowest score?(b) In an isosceles triangle, the base angles are equal. The vertex angle is 40°. What are the base angles of the triangle? (Remember, the sum of three angles of a triangle is 180°).

In a certain isosceles triangle , the measure of the vertex angle is four times the measure of each of the base angles , what is the measure , in degrees, of the vertex angle ?

Write the sum of the angles of an obtuse triangle.

In an isosceles triangle, prove that the angles opposite to equal sides are equal.

In an isosceles triangle, each base angle is four times its vertical angle. Find each angle of the triangle.

Each of the two equal angles of a triangle is twice the third angle. Find the angles of the triangle.

If one angle of a triangle is equal to the sum of the other two angles, then the triangle is

In a triangle, an exterior angle at a vertex is 95^0 and it one of the interior opposite angles is 55^0 find all the angles of the triangle.