Apply properties of angles and parallel and perpendicular lines, including angles formed when parallel lines are cut by a transversal . In the diagram, identify two similar triangles. Use a proof strategy to justify your conclusion. Justify your answer. Its lateral edges are congruent.
All lateral faces are isosceles triangles.
The altitude meets the base at its center. Students apply spatial reasoning, the properties of geometric objects, transformations and symmetry to analyze mathematical situations and solve problems. Represent translations , reflections , rotations and dilations of objects in the plane by using sketches and coordinates. Use geometric ideas to solve problems. Now draw the rectangle dilated so that its length and width both are doubled.