How do I do angles of triangles

Find the value of x for which abcd must be a parallelogram -9-6x x-30

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

The cone in the diagram has the same height and base area as the prism. what is the ratio of the volume of the cone to the volume of the prism? h hl base area-b base area =b volume of cone_1 volume of prism 2 volume of cone 1 volume of prism 3 volume of cone 2 volume of prism 3 oc. od. volume of cone volume of prism e. volume of cone volume of prism 3 2