Answer:
306 m
Step-by-step explanation:
distance between her house and the third point:
280 - 10 = 270 m
distance between the third point and the beach:
164 - 20 = 144 m
We have a right triangle ,then we can apply the Pythagorean theorem:
[tex]\text{the distance between her house and the beach} =\sqrt{\left( 270\right)^{2} +\left( 144\right)^{2} } = 306\ m[/tex]
