Ineed understanding which is a, b, or c

see explanation

Step-by-step explanation:

Using Pythagoras' theorem, that is

The square on the hypotenuse of a right triangle is equal to the sum of the squares on the other two sides.

Using x instead of ?

(a)

The hypotenuse is the side opposite the right angle, that is 74, thus

24² + x² = 74²

576 + x² = 5476 ( subtract 576 from both sides )

x² = 4900 ( take the square root of both sides )

=

x = 70

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(b)

The hypotenuse x is the unknown side here

x² = 40² + 40² = 1600 + 1600 = 3200

Take the square root of both sides

= ≈ 56.6 ( nearest tenth )

17

step-by-step explanation: