by its center d. by its side udy the figure (for itens 20-24) R 7.5 cm A B M N 3. What do you call line segment AB? a radius b. diameter C. secant d. tangent 4. What do you call the distance from point R to point M? a radius b. diameter C. secant d. tangent 5. What is the diameter of the circle? a. 7.5 cm b. 14.10 cm c. 15 cm d. 22.5 cm 6. These are three dimensional figures made up of plane figure whose all sides are joined together to form a close figure, a a. polygons b. circles C. prisms d. spatial figures​