Ex 14 class 9 rs aggarwal

RS Aggarwal Chapter 14 Class 9 Maths Exercise 14.1 Solutions: You may recall that the part of the plane enclosed by a simple closed figure is called a planar region corresponding to that figure. The magnitude or measure of this planar region is called its area. This magnitude or measure is always expressed with the help of a number (in some unit) such as 5 cm2, 8 m2, 3 hectares, etc. So, we can say that area of a figure is a number (in some unit) associated with the part of the plane enclosed by the figure Know more about the chapter Important Definition for RS Aggarwal Chapter 14 Class 9 Maths Ex 14a Solutions • AB and CD are parallel sides of trapezium ABCD. Diagonals AC and BD intersect at O. prove that ar( ΔAOD) = ar(ΔBOC). • If D is the mid .point of side BC of a ΔABC, P, and Q are two points lying respectively on the sides AB and BC such that DP is parallel to QA. Prove that ar(ΔCQP) = 1/2 ar(ΔABC). • A rectangle is formed by joining the mid-points of the sides of a rhombus. Show that the area of a rectangle is half the area of the rhombus. • In a parallelogram ABCD, AE is perpendicular to DC and CF is perpendicular to AD. If AB = 10 cm, AE = 6 cm, and CF = 8 cm, then find AD. • The adjacent sides of a rectangle are 16 cm and 8 cm. Find the area of the rectangle. • PQRS is a square. T and U are the mid-points of sides PS and QR respectively. Find the area of ΔOTS, if PQ= 8 cm, where O is the point of intersection of TU and OS. • If two sides of one triangle are equal...

Contents • 1 RS Aggarwal Solutions for Class 9 Maths Chapter 14–Statistics • • 1.0.1 Ex 14A Solutions • 1.0.2 Ex 14B • 1.0.3 Ex 14C • 1.0.4 Ex 14D • 1.0.5 Ex 14E Solutions • 1.0.6 Ex 14F • 1.0.7 Ex 14G Solutions • 1.0.8 Ex 14H • 2 RS Aggarwal Solutions for Class 9 Maths Chapter 14:Download PDF • 3 Chapterwise RS Aggarwal Solutions for Class 9Maths : • 4 About RS Aggarwal Class 9 Book • 5 FAQs • 6 Read More • 6.1 Related RS Aggarwal Solutions for Class 9 Maths Chapter 14–Statistics RS Aggarwal 9th Maths Chapter 14, Class 9 Maths Chapter 14 solutions Ex 14A Solutions Question 1. Solution: Statistics is a science which deals with the collection, presentation, analysis and interpretations of numerical data. Question 2. Solution: (i) Numerical facts alone constitute data (ii) Qualitative characteristics like intelligence, poverty etc. which cannot be measured, numerically, don’t form data. (iii) Data are an aggregate of facts. A single observation does not form data. (iv) Data collected for a definite purpose may not be suited for another purpose. (v) Data is different experiments are comparable. Question 3. Solution: (i) Primary data : The data collected by the investigator himself with a definite plan in mind are called primary data. (ii) Secondary data : The data collected by some one other than the investigator are called secondary data. The primary data is more reliable and relevant. Question 4. Solution: (i) Variate : Any character which is capable of taking several diffe...