Question

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Answer 1

Answer :-

• 80 °

Solution :-

♧ Supplementary angles add up to 180 degrees

• The equation for these angles is:

x + 100 = 180

• Subtracting the 100 degrees from both sides, we get the value of the unknown angle :

x = 180 - 100

• So , X = 80 °

Hope it helps ~

Answer 2

∠ABD = 100°

∠CBD = x

we have to find the value of x .

Since ∠ABD & ∠CBD formed on straight line.

Then Sum of ∠ABD & ∠CBD is 180° ( by linear pair)

`\dashrightarrow\sf \: 100 {}^( \circ) + x \: = 180 {}^( \circ) \\ \\ \dashrightarrow\sf \:x \: = 180 {}^( \circ) - 100 {}^( \circ) \\ \\ \dashrightarrow\sf \:x \: = 80 {}^( \circ)`

So, the value of x is 80° .