I-True or false: Write true if the statement is correct and false if wrong. 1.Plane Geometry is concerned with the study of the properties and measurement of figures. _2. The box and pyramid of Egypt are examples of solids. _3. Regular polygons of the same number of sides are similar 4. Solid Geometry is a Geometry of space. 5. Books, boxes, marbles and pencils are example of physical solid. 6. Geometric solids have three dimensions. 7. Solids are bounded by surfaces. 8. A curved surface has no part which is a plane. 9. A line is determined by two points. 10. Two lines intersect in a point. Il- Answer the following correctly: 1. What do you think is the least number of faces that a geometric solid may have? What kind of plane figure are these faces? How many edges has such solid? How many vertices? 2. Do you think a solid can be formed in which each face is a rectangle? How many faces would there be? How many edges? How many vertices? 3. Write three solids which have curved surfaces. 4. When a circle appears as line segment, What is the length of a segment? 5. Define a dihedral angle. How do you name a dihedral angle? Illustrate. Ill- Explain: 1. Draw a polyhedral angle V-ABCDE in which V is the vertex. Name the angles. Name the angles and the edges