PRACTICAL GEOMETRY & VISUALISING SOLID SHAPES

Put a tick mark(√) on the correct answer :

Q1.What the point of intersection of the medians of a triangle  called ?

(i)  circum center             (ii) In center          (iii) centroid                 (iv) ortho center

Q2.What the point of intersection of the altitudes of a triangle  called ?

(i)  circum center             (ii) In center          (iii) centroid                 (iv) ortho center

Q3.What the point of intersection of the side bisectors of a triangle  called ?

(i)  circum center             (ii) In center          (iii) centroid                 (iv) ortho center

Q4.What the point of intersection of the angle bisectors of a triangle  called ?

(i)  circum center             (ii) In center          (iii) centroid                 (iv) ortho center

Q5.Which of the following is a three dimensional figure ?

(i)  Square                  (ii) Trapezium (iii) Cube                (iv) Parallelogram

Q6.Find the number of edges of  a  polyhedron having 20 faces & 12 vertices ?

(i)  10                             (ii) 20                         (iii) 25                      (iv) 30

Q7.Find the number of faces of  a  polyhedron having 6 vertices & 12 edges ?

(i)  8                               (ii) 10                         (iii) 12                     (iv) 14

Q8.Find the number of vertices of  a  polyhedron having 5 faces & 9  edges ?

(i)  18                               (ii) 12                         (iii) 6                    (iv) 4

Q9.What the name of the polyhedron is whose base & top are congruent polygons & whose lateral faces are  parallelograms in shape ?

(i)  Tetrahedron            (ii) Trapezium           (iii) Prism               (iv) Parallelogram

Q10.How many faces a tetrahedron has ?

(i)  14                               (ii) 12                         (iii) 6                     (iv) 4