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ST. JOSEPH’S SCHOOL, NAWADA, PERIODIC ASSESSMENT-3, 2022, Class : 8 Subject: Maths M.M. : 20, , , , 1. The sum of the measures of all the four angles of a quadrilateral is, (a) 90°, (b) 180°, (c) 360°, (d) 720°., 2. The measures of the three angles of a quadrilateral are 65°, 75° and 85°. The measure of the fourth angle is, (a) 65°, (b) 75°, (c) 85°, (d) 135°., 3. The measures of two angles of a quadrilateral are 110° and 100". The remaining two angles are equal. The, measure of each of the remaining two angles is, (a) 30°, (b) 60°, (c) 75°, (d) 45°,, 4. Which of the following statements is false ?, (a) All the angles of a rectangle are equal, (b) No angle of a rectangle can be obtuse, (c) The diagonals of a rectangle bisect each other, (d) The opposite sides of a rectangle are not equal., 5. Which of the following statement is true ?, (a) All the rectangles are squares, (b) All the parallelograms are rhombuses, (c) All the squares are rhombuses, (d) Each parallelogram is a trapezium., 6. In a parallelagram 7A ; 7B = 1: 2. Then, 7A =, (a) 30°, (b) 60°, (c) 45°, (d) 90°., 7. The four angles of a quadrilateral are in the ratio 1: 2: 3: 4. The measure of its smallest angle is, (a) 120°, (b) 36°, (c) 18°, (d) 10°., 8. ABCD is a rhombus such that zACB = 40°, then zADB is, , (a) 40°, (b) 45°, (c) 50°, (d) 60°, 9. The bisectors of any two adjacent angles of a || gm intersect at, (a) 30°, (b) 45°, (c) 60°, (d) 90°

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10. If the diagonal of a rhombus are 18 cm and 24 cm respectively, then its side is equal to, (a) 16 cm, (b) 15cm, (c) 20cm, (d) 17 cm, 11. A diagonal of a rectangle is inclined to one side of the rectangle at 25°. The acute angle between the, diagonals is, (a) 55°, (b) 50°, (c) 40°, (d) 25°, 12. Perimeter of a parallelogram is 22 cm. If the longer side, measures 6.5 cm, the measure of the shorter side, will be, (a)4.5 cm, (b) 6.5 cm, (c)2.50m, (d) 3.0 cm, 13. For a polyhedron, if 'F' stands for number of faces, V stands for number of vertices and E stands for number, of edges. then which of the following relationships is named as Euler's formula ?, (a)F+V=E+2, (ol) F+E=V42, (c) V+E=Fe2, (d) F+# V=E-2., 14. Number of vertices a cone has:, (a) One, (b) Two, (c) Three, (d) Four, 15. If a polyhedron has 6 vertices and 12 edges. What is the number of faces it has ?, (a)6, (b) 8, (c) 12, (d) 18, 16. The top-view of a cube looks like a:, (a) Circle, (b) Square, (c) Rectangle, (d) Triangle, 17. Which is the three-dimensional figure formed by rotating a triangle?, (a) Cone, (b) Quadrilateral, (c) Prism, (d) Square, 18. A three dimensional shape is object., (a) solid, (b) 2d, (c) plane, (d) None of these

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19. Which of the following statements is false?, (a) A sphere has one flat surface., (b) A cone has one flat face., (c) A cylinder has two circular faces., (d) A sphere has one curved face., 20. The faces of a triangular pyramid consist of, (a) 1 square and 3 triangles, (b) 2 triangles and 3 rectangles, (c) 4 triangles, (d) 2 rectangles and 3 triangles