Question

Find the length of the unknown side. Round your answer to the nearest whole number.

Answer 1

Suppose ABC is a right triangle with B = 90°.

Then, by Pythogoras theorem,

$AC^{2} =AB^{2} + BC^{2}$

$= 7^{2} + 7^{2}$

$= 2(7^{2})$

$AC = 7\sqrt{2}$

= 7 × 1.414

= 9.898

≅ 10 meters

Answer 2

7^{2} + 7^{2} = C^{2} 
49 + 49 = C^{2} 
98 = C^{2} 
9.8 ≈ C
10 ≈ C
C = hypotenuse