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PLEASE HELP!!!!!!

Look at the triangle ABC.
A (4.5)
5
4
3
2
1
C (4.1)
B (2.1)
1 2 3
4 5
--5 -4 -3 -2 -1 0
-1
-2
-3
-4
-5
What is the length of the side AB of the triangle?
2
20
38

PLEASE HELP!!!!!! Look at the triangle ABC. A (4.5) 5 4 3 2 1 C (4.1) B (2.1) 1 2 3 4 5 --5 -4 -3 -2 -1 0 -1 -2 -3 -4 -5 What-example-1
User Swoox
by
8.1k points

2 Answers

4 votes

Answer:

The answer is
√(20).

Step-by-step explanation:

Use the Pythagorean Theorem.


2^(2) + 4^(2) = c^(2) \\4+16 = c^(2) \\√(20) = c

User Jianru Shi
by
8.5k points
2 votes

Answer: sqrt(20)

=========================================

Step-by-step explanation:

Count out the spaces, or use subtraction, to find the horizontal side BC is 2 units long. Similarly, you'll find the vertical side AC is 4 units long.

Use the pythagorean theorem to find the length of segment AB.

a^2 + b^2 = c^2

2^2 + 4^2 = c^2

4 + 16 = c^2

20 = c^2

c^2 = 20

c = sqrt(20)

We stop here since it matches with choice B.

-----------------

Optionally, we can simplify like so

sqrt(20) = sqrt(4*5)

sqrt(20) = sqrt(4)*sqrt(5)

sqrt(20) = 2*sqrt(5)

User Darkdante
by
8.8k points

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