Question

What’s the missing side length? Round to the nearest tenth

Answer 1

Since it’s a right triangle, use Pythagorean theorem
a^2 + b^2 = c^2
a = 1, b = 2, c = missing side

1^2 + 2^2 = c^2
1 + 4 = c^2
c^2 = 5, c = square root of 5

Solution: c = 2.2

Answer 2

2.24

Explanation:

1^2 + 2^2 =c^2

1 + 4 = c^2

c= square root of 5

2.24