Ex 5.1, 7 - Chapter 5 Class 7 Lines and Angles
Last updated at April 16, 2024 by Teachoo
Ex 5.1
Ex 5.1, 1 (ii) Important
Ex 5.1, 1 (iii) Important
Ex 5.1, 2 (i)
Ex 5.1, 2 (ii) Important
Ex 5.1, 2 (iii) Important
Ex 5.1, 3 (i)
Ex 5.1, 3 (ii) Important
Ex 5.1, 3 (iii)
Ex 5.1, 3 (iv) Important
Ex 5.1, 3 (v)
Ex 5.1, 3 (vi) Important
Ex 5.1, 4
Ex 5.1, 5 Important
Ex 5.1, 6
Ex 5.1, 7 Important You are here
Ex 5.1, 8
Ex 5.1, 9 (i) Important
Ex 5.1, 9 (ii)
Ex 5.1, 9 (iii)
Ex 5.1, 10
Question 1
Question 2 Important
Question 3
Question 4 (i)
Question 4 (ii) Important
Question 5 (i) Important
Question 5 (ii)
Question 5 (iii) Important
Last updated at April 16, 2024 by Teachoo
Ex 5.1, 7 Can two angles be supplementary if both of them are: (i) acute? We know that If two angles are supplementary, their sum is 180°. If both angles are acute Angle 1 < 90° Angle 2 < 90° Example: 30 ° & 85° 30° + 85 ° = 115° ≠ 180° Since sum is not 180°, they are not supplementary Let’s take another example. If Angles are 89° & 89° 89° + 89° = 178° ≠ 180° Since sum is not 180°, they are not supplementary Ex 5.1, 7 Can two angles be supplementary if both of them are: (ii) obtuse? We know that If two angles are supplementary, their sum is 180°. If both angles are obtuse Angle 1 > 90° Angle 2 > 90° Example: 100 ° & 120° 100° + 120° = 220° ≠ 180° Since sum is not 180°, they are not supplementary Let’s take another example. If Angles are 91° & 91° 91° + 91° = 182° ≠ 180° Since sum is not 180°, they are not supplementary Ex 5.1, 7 Can two angles be supplementary if both of them are: (iii) right? We know that If two angles are supplementary, their sum is 180°. If both the angles are right angles. Angle 1 = 90° Angle 2 = 90° Here, Angle 1 + Angle 2 = 90° + 90° = 180° Since, sum of both angles is 180° So, they are supplementary.