A(n)is the intersection of a solid and a plane.

A. edge

B. vertex

C. cross section

Trapezoid abcd is an isosceles trapezoid, ad||cb, a diagonal line runs from angle d to b. angle cdb is 50 degrees and angle dab is 70 degrees, find the remaining angle degrees for angles bda, dba, bcd, and dcb.

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

Tell whether the two rates form a proportion