Exercise 15.1 1. The following graph shows the temperature of a patient in a hospital, recorded every hour. (a) What was the patient’s temperature at 1 p.m.? (b) When was the patient’s temperature 38.5° C? (c) The…

Exercise 16.1 Find the values of the letters in each of the following and give reasons for the steps involved. 1. Solution: Say, A = 7 and we get, 7+5 = 12 In which one’s place is…

Exercise- 1.1 1. Following number line shows the temperature in degree Celsius (co) at different places on a particular day. (a) Observe this number line and write the temperature of the places marked on it. Solution: –…

Exercise 2.1            1. Solve: (i) 2 – (3/5) Solution: – For subtraction of two unlike fractions, first change them to the like fractions. LCM of 1, 5 = 5 Now, let us change each of the given…

Exercise 3.1 1. Find the range of heights of any ten students of your class. Solution: – Let us assume heights (in cm) of 10 students of our class. = 130, 132, 135, 137, 139, 140, 142,…

Exercise 4.1 1. Complete the last column of the table. S. No. Equation Value Say, whether the equation is satisfied. (Yes/No) (i) x + 3 = 0 x = 3 (ii) x + 3 = 0 x…

EXERCISE 5.1  1. Find the complement of each of the following angles: (i) Two angles are said to be complementary if the sum of their measures is 90o. The given angle is 20o Let the measure of…

Exercise 6.1 1. In Δ PQR, D is the mid-point of QR. (i)  PM is ___. Solution: – Altitude An altitude has one end point at a vertex of the triangle and other on the line containing the opposite…

Exercise 7.1 1. Complete the following statements: (a) Two-line segments are congruent if ___________. Solution: – Two line segments are congruent if they have the same length. (b) Among two congruent angles, one has a measure of…

Exercise 8.1 1. Find the ratio of: (a) ₹ 5 to 50 paise Solution: – We know that, ₹ 1 = 100 paise Then, ₹ 5 = 5 × 100 = 500 paise Now we have to…