Question

Work out the length of AB.

Give your answer to 3 significant figures.
A (-1, 6)
B (5, 3)

Answer 1

AB = 6.71

Explanation:

See the attached worksheet.

Find the lengths of the two sides of the right triangle:

CB = (5 - (-1)) = 6

CA = (6-3) = 3

Use the Phythagorean Theorem to find AB.

6^2 + 3^2 = AB^2

AB^2 = 45

AB = 6.71