Question

In the triangle below,
y = [ ? ] cm. Round to the
nearest tenth.

Answer 1

The answer is

12.3 cm

Explanation:

Since the triangle is a right angled triangle we can use trigonometric ratios to find y

To find y we use cosine

cos∅ = adjacent / hypotenuse

From the question

y is the adjacent

The hypotenuse is 15

So we have

`\cos(35) = (y)/(15) \\ y = 15 \cos( 35 ) \\ y = 12.28728`

We have the final answer as

12.3 cm to the nearest tenth

Hope this helps you