Pythagorean Theorem in Coordinate Systems

Question 1
Anna is trying to find the length of segment AC. Which equation could she use?
Responses
A AC = 2 + 7AC = 2 + 7
B
=
+
AC 2 = 4 2 + 1 2
C
=
+
AC 2 = 2 2 + 7 2
D
=

AC 2 = 7 2 − 2 2
Question 2
To the nearest tenth, which choice is the length of AC?
Responses
A 2.22.2
B 6.86.8
C 7.37.3
D 8.28.2
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1 answer

Question 1: C - AC^2 = 2^2 + 7^2

Question 2: B - 6.8