Two angles

The triangles ABC and A'B'C 'are similar. In the ABC triangle, the two angles are 25° and 65°. Explain why in the triangle A'B'C 'is the sum of two angles of 90 degrees.

Correct answer:

x =  90 °

Step-by-step explanation:

$$\begin{gathered} A=25\text{ ° } \\ B=65\text{ ° } \\ C=180-(A+B)=180-(25+65)=90\text{ ° } \\ x=A+B=25+65=90\text{°} \end{gathered}$$

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