Question

what is the value of side AC if BA 7cm and BC 5cm​

Answer 1

Answer:

Step-by-step explanation:

using Pythagoras theorem h^2 = √ l^2 + b^2

AC^2 = √AB^2 + BC^2

= √ 7^2 cm+ 5^2cm

= √49 cm + 25 cm

= √ 74 cm

AC = 8 . 60

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Answer 2

Step-by-step explanation:

Since, △ABC is a right angled triangle. We can apply Pythagoras' Theorem to find the length of AB.

According to Pythagoras’ theorem, “In a right angled triangle: The square of the hypotenuse is equal to the sum of the squares of the other two sides.”

Applying Pythagoras’ theorem in △ABC, we get

AB2=AC2+BC2

⇒AB2=52+122

⇒AB2=25+144

⇒AB2=169

⇒AB=169−−−√

⇒AB=13 cm

∴ Length of AB is 13 cm.