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slices made perfume at perpendicular to base of the right rectangular pyramid through the vertex what is the area of resulting the two-dimensional cross-section

12 point are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr?

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?