Page 152 - Maths Skills - 7

Lines and Angles
9 9 Lines and Angles

Learning Outcomes

In this chapter, you will learn about:
� Line segment � Line � Ray
� Angle � Types of angles � Pair of angles
� Pair of lines � Angles made by a transversal with � Angles made by a transversal with
two lines two parallel lines

Boot-Up (To Recapitulate Previous Knowledge of Concepts)

COMPETENCY BASED QUESTIONS
A. Multiple-Choice Questions

1. If each angle of a triangle is 60°, then the triangle is a/an _____________.
(i) scalene triangle (ii) isosceles triangle (iii) obtuse angled triangle (iv) equilateral triangle
2. A triangle with three unequal sides is _____________.

(i) scalene triangle (ii) isosceles triangle (iii) equilateral triangle (iv) acute-angled triangle
3
3. The degree measure of of a complete revolution is _____________.
4
(i) 90° (ii) 270° (iii) 360° (iv) 180°

4. Which of the following is an example of parallel lines?
(i) Adjacent edge of a door (ii) The line segments forming the letter X
(iii) Railway tracks (iv) Electric pole on the road

B. Fill in the Blanks

1. An _____________ is formed when two rays have the same starting point.
2. A triangle is called _____________ if its two angles are equal.
3. The longest side of a right angled triangle is called _____________.

4. A line that bisects a side or an angle is called _____________.

C. Write ‘T’ for true and ‘F’ for false Statements
1. The two diameters of a circle will necessarily intersect.

2. The centre of a circle is always in its interior.

3. The two chords of a circle will necessarily intersect each other.

4. The angle sum property of triangle states that the angles of triangle always add up to 360°.