①Write the complementary angles of the given angles.
(i) 700
(ii) 450
(iii) 400
(iv) 600
②Write the supplementary angles of the given angles.
(i) 1000
(ii) 900
(iii) 600
(iv) 300
③ (i) In figure 4, Name the angles forming a linear pair.
Answer: __________ and ________] __________ and _________
(ii) Fill in the blanks:
(a) ∠AOC + ______ = 1800
(b) ∠AOD + ______ = 1800
Answers
1st roman and second roman questions are wrong because sum of two complementary angles =90degrees
and sum of two supplementary angles will be 180 degrees
Given : angles. (i) 70° (ii) 45° (iii) 40°0 (iv) 60°
To find : complementary angles
Solution:
Complementary angles are angle pairs whose measures sum to one right angle (1/4 turn, 90°, or π/2 radians).
complementary angles of 70° = 20°
complementary angles of 45° = 45°
complementary angles of 40° = 50°
complementary angles of 60° = 30°
supplementary angles forms a linear pair means sum = 180°
supplementary angle of 100° = 80°
supplementary angle of 90° = 90°
supplementary angle of 60° = 120°
supplementary angle of 30° = 150°
∠AOC & ∠BOC forming a linear pair.
∠AOD & ∠BOD forming a linear pair.
∠AOC + ∠BOC = 180°
∠AOD + ∠BOD = 180°
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