Checkpoint: roads, altitudes and rays
Four questions on the last three ideas. Feedback comes right away. Retry whenever you want.
Sticks of 6 cm and 9 cm are given. Which third stick can close into a triangle?
What is true of an acute-angled triangle?
Two angles at the ends of a side are 61° and 47°. What is the third angle?
Two angles at the ends of a side are 95° and 85°. What happens?
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