Question

Find the missing length of the triangle.

Answer 1

c = 29 km

Explanation:

21² + 20² = c²

441 + 400 = 841

√841 = 29

Answer 2

29 = c

Explanation:

Since this is a right triangle we can use the Pythagorean theorem

a^2+b^2= c^2 where a and b are the legs and c is the hypotenuse

20^2 + 21^2 = c^2

400 +441 =c^2

841 = c^2

Take the square root of each side

sqrt(841) = sqrt(c^2)

29 = c