Question

5. In Fig. 8.91, arrange the angles in descending
order of magnitude.
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Answer 1

Answer:

Let one angle of a triangle be x.

Second angle will be x+10.

Third angle will be x+20.

Using theorem, Sum of interior angles of a triangle is 180

o

.

Hence ∠A+∠B+∠C=180

o

⇒x+x+10+x+20=180

o

⇒3x+30=180

o

⇒x=50

o

∴ Angles are 50

o

,60

o

,70

o

Answer 2

1 is the multiplicative identity of intergers