Question

What is the value of angle X and angle Y in the triangle diagram below?

Answer 1

Sum of two interior angles=exterior angle

`\\ \rm\Rrightarrow 45+65=y`

`\\ \rm\Rrightarrow y=110`

• Linear pairs have sum 180

`\\ \rm\Rrightarrow x+y=180`

`\\ \rm\Rrightarrow x+110=180`

`\\ \rm\Rrightarrow x=70`