Answer:
triangle.
Step-by-step explanation:
given: a square pyramid
to find : shape of cross section made when a plane perpendicular
to base and passes through top vertex.
when a plane cuts the square pyramid perpendicular to base and passes through top vertex we get a cross section made by its two equal slant height and side of the square.
therefore, we get a triangle or more specifically isosceles triangle.
picture is attached.
