A scale drawing of a lake has a scale of 1 cm to 80 m. If the actual width was f the lake is 1,000 m, what is the width of the lake on the scale drawing?

12,5 centimeters.

Step-by-step explanation:

We take the following proportion

Which becomes:

And then, we clear out the variable x:

And this means that the width of the lake on the scale drawing will be 12.5 cm.

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: