Question

Please solve question no.4

Answer 1

Hi pupil here's your answer ::

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✔Please see the attached answer

So we know that sum of all the angles is 360°

so,
x+y+w+z= 360°
x+ y + x + y = 360°(as ⏩x+y=w+z⏪)
2x + 2y = 360°
2 (x+y) = 360° ( take ⏩2⏪ as common)
x+y =360/2
x+y=180°

So, It is Proved that is a line as
every line measures 180° .

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hope that it helps. . . . . .

Answer 2

Hey mate!

Here is your answer > >

Given- x+y=w+z

To prove-AOB is a line

Proof- x+y+w+z=360°(Sum of Angles round a point =360°)

x+y+x+y=360°(x+y=w+z)

2 (x+y)=360°

x+y=180°

=> AOB is a line

Hope it helps!

Thankyou ☆ ☆