One angle on the base of an isosceles triangle is 30°. What is the measure of its vertical angle?​

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?

Type the correct answer in each box, round your answers to the nearest integer 20 25 30 in the figure, the perimeter of hexagon abcdef is approximately w units, and its area is square units

If the value of cos330°is√3/2 then find cos 165°.