Question

In the adjoining figure bac=90°,ac=400m and an =300m. Find the length of bc.

Answer 1

I hope AB=300m

there is only three points
then it will be a triangle.

<BAC=90°
Therefore it is a right angled triangle
Then
by Pythagoras theorem
BC²=AB²+AC²
BC²=300²+400²
BC²=90000+160000
BC²=250000
BC=√250000
BC=500m=0.5km


hope it helps