Question

7.
In the adjoining figure, AOB is a straight line. Find the value of x.
(x + 20)
(x + 3)
(x+709
28.
Find the thenemiel
al A2
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Answer 1

Answer:

From the figure we know that ∠AOB is a straight line

So we get

∠AOB=180o

It can also be written as

∠AOC+∠COD+∠BOD=180o

By substituting the values

(3x−7)o+55o+(x+20)o=180o

3x−7o+55o+x+20o=180o

On further calculate

4x+180o=180o

4x=112o

x=28o

By substituting the value of x we get

∠AOC=(3x−7)o=3(28o)−7o

=84o−7o=77o

∠BOD=(x+20)o=(28+20)o=48o

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Answer 2

Step-by-step explanation:

Given:- AOB is a straight line.

To prove:- Value of x

Proof:- hey man listen I cannot get the answer show me the figure of this question