Angles in a triangle - special cases
Go to https://whiterosemaths.com/homelearning/year-6/ and watch the video for lesson 3 - angles in a triangle - special cases.
Then have a go at the questions https://wrm-13b48.kxcdn.com/wp-content/uploads/2020/homelearning/year-6/Lesson-3-Y6-Summer-Block-1-WO6-Angles-in-a-triangle-special-cases-2020.pdf
Don't forget to check your answers once you have finished!