Find the $∠ A C B$ , as shown in the figure.

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Solution

In this triangle, the sum of two angles is equal to the third angle.
Here, we have to find $∠ A C B$ .

The sum of three angles of a triangle are $180 °$ ,

$x + y + (x + y) = 180 ° \Rightarrow 2 (x + y) = 180 ° \Rightarrow (x + y) = 90 ° \Rightarrow ∠ A C B = 90 °$

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Find the ∠ACB, as shown in the figure.

In this triangle, the sum of two angles is equal to the third angle. Here, we have to find ∠ACB. The sum of three angles of a triangle are 180°, x+y + (x+y) = 180°⇒2(x+y) = 180°⇒(x + y) = 90°⇒∠ACB = 90°

Find the $∠ A C B$ , as shown in the figure.

In this triangle, the sum of two angles is equal to the third angle.
Here, we have to find $∠ A C B$ .

The sum of three angles of a triangle are $180 °$ ,

$x + y + (x + y) = 180 ° \Rightarrow 2 (x + y) = 180 ° \Rightarrow (x + y) = 90 ° \Rightarrow ∠ A C B = 90 °$