Question

Rachel rides her biycle 12 kilometers due south from her home. Then she turns and rides 9 kilometets due west. How far is rachel from her home?

Answer 1

Answer: 15 km

Explanation:

Pythagorean triples is used for this:

Pythagorean triples= 3-4-5 (not subtraction)

Find hypotenuse (long side): Since 12 down, 9 left

a2+b2=c2

Formula: (9x9)+(12x12)=
`√(cxc)`

(c*c)= 81+144=225 (square root)

= 15km

Answer 2

Hope this helps! Just use the Pythagorean’s theorem.