What is the length of the hypotenuse of the triangle?
√ 20 cm
√ 23 cm
√ 40 cm
√ 58 cm

Answer:
√58 cm.
Step-by-step explanation:
The hypotenuse is the line AB.
Using the Pythagoras theorem:
AB^2 = 3^2 + 7^2
AB^2 = 9 + 49 = 58
AB = √58 cm.