Question

full NCERT 7th Standard ex 5.1 (Full exercise pls
)

Answer 1

Step-by-step explanation:

Answer:

Complementary angle = 90∘– given angle

(i) Complement of 20∘ = 90∘–20∘=70∘

(ii) Complement of 63∘ = 

Answer:

Supplementary angle = 180∘–180∘– given angle

(i) Supplement of 105∘105∘ = 180∘–105∘=75∘180∘–105∘=75∘

(ii) Supplement of 87∘87∘ = 180∘–87∘=93∘180∘–87∘=93∘

Supplement of 154∘154∘ = 180∘–154∘=

If sum of two angles is 180∘180∘, then they are called supplementary angles.

If sum of two angles is 90∘,90∘, then they are called complementary angles.

(i) 65∘+115∘=180∘65∘+115∘=180∘ These are supplementary angles.

(ii) 63∘+27∘=90∘63∘+27∘=90∘ These are complementary angles.

(iii) 112∘+68∘=180∘112∘+68∘=180∘ These are supplementary angles.

(iv) 130∘+50∘=180∘130∘+50∘=180∘ These are supplementary angles.

(v) 45∘+45∘=90∘45∘+45∘=90∘ These are complementary angles.

(vi) 80∘+10∘=90∘80∘+10∘=90∘ These are complementary angles.