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INDIAN SCHOOL MUSCAT DEPARTMENT OF MATHEMATICS FORMATIVE ASSESSMENT - 2 GROUP ACTIVITY CLASS -9 Time: 45 min Max. Marks: 10 Complete the cross word puzzle, by answering the questions given below : 1 2 4 6 7 8 12 3 5 11 10 DOWN 1. A / An ________ angle measures between 00 and 900. 2. An angle is formed when two rays originate from the same end point, this point is called _____. 5. A __________ has just one end point. 7. Angle between two adjacent walls of a room is an example of _______ angle. 12. If 2 lines are extended indefinitely in both directions and never meet, are called ____ lines. DOWN 1. A / An ________ angle measures between 00 and 900. 2. An angle is formed when two rays originate from the same end point, this point is called _____. 5. If a transversal intersects two parallel lines, then each pair of __________ interior angles is equal. 7. Angle between two adjacent walls of a room is an example of _______ angle. 12. If 2 lines are extended indefinitely in both directions and never meet, are called ____ lines. ACROSS 1.The rays making an angle are called ____. 3. A line which intersects two or more lines at distance points is called a ________. 4. Three or more points lying on same line, are called ________ points. 6. Angle made by two hands of the clock at 6 o’clock is an example of _____ angle. 8. An angle which is greater than 1800 but less than 3600 is called a ______ angle. 10. Two angles are ______, if they have a common vertex, a common arm and their non-common arms are on different sides of the common arm. 11.The sum of the angles of a ______ is 1800. Answer the following questions: 1. In the given fig; line l is parallel to line m, find 1 and 2 2. In the fig; find the value of x 3. In the fig; if AOC = 500 , find (AOD + COB) 4. In the given fig; 1 = 2, find the measure 3 and 4