Question

What's the length of side AB in ΔABC shown?

Answer 1

Answer:

5

Step-by-step explanation:

You are to use Pythagoras' Theorem here since it is a right angled triangle (the right angle is marked at vertex A).

By the Pythagoras' Theorem, we must have

x² + 12² = 13²

So

x² = 13² - 12² = 169 - 144 = 25

From here, you get x = 5.

Answer 2

Hello friend

here is your answer

BC^2 = AB^2 + AC^2

or,. AB^2 = BC^2 - AB^2

or, AB. = √BC^2 - AB^2

or, AB = √(13)^2 - (12)^2

or, AB = √169 - 144

or, AB = √25 = 5

the value of AB is 5

hope it helps