Answer : I don't understand your language, please use English
Explanation:
If there is a waterfall or rapids than you couldn't go swimming in the river
Answer:
The greatest angle is 
Explanation:
According to angle sum property of a triangle, sum of all the angles of a triangle is equal to
°.
The given angles of a triangle are 
Therefore,
°
°
°

≈ 87.2°
≈ 71.8°
≈ 20.9°
Therefore, greatest angle is 
Answer:
banff national park
mountain recreation and galcial lakes