The 3 interior angles add up to 180 degrees and the base angles are equal in size
The vertex angle of an isosceles triangle is equal to the measure of each of its base angles. Therefore, if one of the base angles measures 42 degrees, then the vertex angle also measures 42 degrees.
84 degrees
84 degrees
If your "53" is in degrees, then the vertex angle is 74 degrees.
Vertex angle is 180-53-53 = 74 degrees
Vertex angle: 180-42-42 = 96 degrees
130 degrees is the measure of the base angles of an isosceles triangle whose vertex has a measure of 50 degrees.
Its 2 equal base angles will each measure 65 degrees
Each base angle is 62.5 degrees
(180 - 38)/2 = 71 degrees (base angles of an isosceles triangle are congruent).
If the 58°-angle is one of the base angles, then the vertex angle is 64°.If the 58°-angle is the vertex angle, then the vertex angle is 58°.
The measure of each base angle in an isosceles triangle can be calculated by dividing the total angle sum by the number of base angles, i.e., (180 - vertex angle) / 2. In this case, each base angle of the isosceles triangle would measure (180 - 38) / 2 = 71 degrees.