Question

Mara ran 3km north and then 4km east. She will finish her run by running directly home. What was the total distance of her run?

Answer 1

its option C

Explanation:

Answer 2

So we need to find the length of the hypotenuse of a right triangle with sides of 3 and 4, then add that distance to 3 and 4.

By the Pythagorean Theorme, the hypotenuse squared is equal to the sum of the sides squared...

d^2=3^2+4^2

d^2=9+16

d^2=25

d=√25

d=5

So the total distance of her run is 5+4+3=12 km