Reasoning with Geometry

3. A solid geometric figure whose two end faces are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms.
4. A type of transformation that takes each point in a figure and rotates it a certain number of degrees around a given point.
5. A round solid figure, or its surface, with every point on its surface equidistant from its center.
6. A solid or hollow object which tapers from a circular or roughly circular base to a point.
8. A quadrilateral with reflection symmetry across a diagonal.
9. A polygonal base and flat triangular faces, which join at a common point called the apex
10. A three-dimensional solid that holds two parallel bases joined by a curved surface, at a fixed distance.
13. The center of a triangle's circumcircle.
14. A quadrilateral with both pairs of opposite sides parallel and all sides the same length.
15. The distance across a circle through the centre

1. A quadrilateral with one pair of opposite sides parallel.
2. A plane figure with four equal sides and four right (90°) angles.
4. A closed 2-D shape, having 4 sides, 4 corners, and 4 right angles (90°).
7. The centre point of the object.
9. A special type of quadrilateral that has both pairs of opposite sides parallel and equal.
11. The distance from the centre of a circle to any point on the boundary
12. The center of the incircle for a polygon or insphere for a polyhedron (when they exist).