Question

ABC is a triangle,right angle at C. If AB =25 cm and AC = 7cm. Find BC

Answer 1

BC = 24 cm

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Answer 2

Given:

ABC is a triangle,right angle at C. If AB =25 cm and AC = 7cm

To find:

The value of the side BC

Solution:

Here we have given the right-angled triangle, so any of the side this triangle is given by:

By the Pythagoras theorem:

Which stated as sum of the square of the perpendicular and base of the triangle is equal to the square of the hypotenuse of the triangle.

P² + B² = H²

• AC² + BC² = AB²
• 7² + BC² = 25²
• 49 + BC² = 625
• BC² = 625 - 49
• BC² = 576
• BC = √576
• BC = 24

So the length of the4 BC is 24 cm