Question

Find the length of side AC.

Answer 1

45

Explanation:

because its a right angled triangle which should be 90 degrees so 90-45=45 so AC is 45 and AB is 45 so the triangle ACB is 90

Answer 2

The length of side AC is 4.25

Explanation:

By using trigonometric formula

Sin θ = Perpendicular / Hypotenuse

But we dont have the angle A so lets find that first

We know that the sum of all interior angles of triangle is 180 so 45+A+90 = 180

Or A+135= 180 => A= 45

Now

Sin θ = Perpendicular / Hypotenuse

Sin 45 = perpendicular / 5

0.85 = Perpendicular / 5

Perpendicular = 5 * 0.85

Perpendicular = 4.25 which is AC