1.an exterior angle at the vertex of an isosceles triangle
measures 150°. find the measure, in degrees, of a base
angle of the triangle.

2.vertex angle a of isosceles triangle abc measures 70°.
what is the measure, in degrees, of an exterior angle at b?

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

The formula for the lateral area of a right cone is la = rs, where r is the radius of the base and s is the slant height of the cone. which are equivalent equations?

We just started the introduction into circles and i have no idea how to do this.