NCERT Solutions for Class 7 Maths Chapter 11

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The temperature at 12 noon was 10° C above zero. Its headquarters are located at Sri Aurobindo Marg in New Delhi.

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Question 4: Find the angle which is equal to its complement. Answer: Let the angle be x. Complement of this angle is also x. The sum of the measures of a complementary angle pair is 90º. Answer: Let the angle be x. Supplement of this angle is also x. The sum of the measures of a supplementary angle pair is 180º. Question 7: Can ncert solution of class 7th maths angles be supplementary if both of them are: i Acute. Acute angle is always lesser than 90º. It can be observed that two angles, even of 89º, cannot add up to 180º. Therefore, two acute angles cannot be in a supplementary angle pair. Obtuse angle is always greater than 90º. It can be observed that two angles, even of 91º, will always add up to more than 180º. Therefore, two obtuse angles cannot be in a supplementary angle pair. Question 8: An angle is greater than 45°. Is its complementary angle greater than 45° or equal to 45° or less than 45°. Answer: Let A and B are two angles making a complementary angle pair and A is greater than 45º. Therefore, these are not adjacent to each other. Question 10: Indicate which pairs of angles are: i Vertically opposite angles. Answer: i 90° ii 180° iii Supplementary iv Linear pair v Equal vi Obtuse angles Question 14: In the adjoining figure, name the following pairs of angles. Answer: i Consider two lines, l and m, and a transversal line n which is intersecting them. However, here their measures are 75º and 105º respectively. Hence, these lines are not parallel to each other. Here, their measures are 57º and 57º respectively. Hence, these lines are parallel to each other. However, here their measures are 72º and 82º respectively. Hence, these lines are not parallel to each other.

At Srinagar temperature was — 5°C on Monday and then it dropped by 2°C on Tuesday. In a quiz, positive marks are given for correct answers and negative marks are given for incorrect answered. In a class test containing 10 questions, 5 marks are awarded for every correct answer and — 2 marks are awarded for every incorrect answer and 0 for questions not attempted. Here, their measures are 57º and 57º respectively. Is it also less than the temperature at Srinagar? If it decreases at the rate of 2° C per hour until midnight, at what time would be the temperature at mid — night? Click Here for main page or move to of the page. In a quiz, team A scored — 40, 10, 0 and team scored 10, 0, — 40 in three successive rounds. If the width of each road is 3 m, find i the area covered by the roads. Construction: i Draw a line N and take a point O on it.