Page 168 - Maths Skills - 7

The Triangle and Its Propertieshe Triangle and Its Properties
10
10 T

Learning Outcomes

In this chapter, you will learn about:
� Interior and exterior of a triangle � Medians of a triangle � Altitude of a triangle
� Properties of triangles � Triangle inequality property � Two special triangles: equilateral and
� Pythagoras’ theorem isosceles

Boot-Up (To Recapitulate Previous Knowledge of Concepts)

COMPETENCY BASED QUESTIONS

A. Multiple-Choice Questions
1. A triangle is a polygon containing

(i) 2 sides (ii) 4 sides (iii) 3 sides (iv) 5 sides
2. The triangle in which all three sides are equal is called
(i) scalene triangle (ii) isosceles triangle

(iii) right angled (iv) equilateral triangle
3. A triangle in which two sides are equal is known as

(i) right angled (ii) scalene (iii) isosceles (iv) right angled
4. The measure of each angle of an equilateral triangle is
(i) 60° (ii) 75° (iii) 90° (iv) 30°

B. Fill in the Blanks
1. The sum of three angles of a triangle is ________________.

2. The triangle in which one angle is greater than 90° is called ________________.
3. A triangle with all sides and angles unequal in measure is called ________________.

4. There are ________________ exterior and ________________interior angles in a triangle.

C. Write ‘T’ for true and ‘F’ for false Statements

1. A triangle with all sides unequal is called an isosceles triangle.

2. Each of the three angles is less than 90° in an acute angled triangle.

3. A triangle is a polygon of 4 sides.

4. Right angled triangle consists of only one right angle.