Answer:
21√2 m
Step-by-step explanation:
AC = √AD²+CD²
= √21²+21²
=√2×21²
= 21√2 m
Answer:
C
Step-by-step explanation:
First, let us try the first on:
sqrt (5^2+4^2)=sqrt 41 so it can't be A
Second one:
sqrt (6^2+7^2)=sqrt 85, no
Third one:
sqrt (8^2+6^2)=sqrt 100 = 10, so it is C
Answer:
400
Step-by-step explanation:
