Please anyone help please ASAP

The measure of the largest triangle is 72.

Step-by-step explanation:

Set up an equation to find the angle. note that angles in a triangle sum to 180.

With this information, we can set up an equation:

24x + 21x + 15x = 180

(add the x terms)

60x = 180

(divide both sides by 60)

x = 3

We now know what x equals. Now, we can multiply 3 by the largest angle of all- 24.

24 * 3 = 60.

Hope this helps.

Step-by-step explanation:

Given

Required

Find b

To solve this, we make use of the following trigonometry rule:

If

Then:

So:

Collect like terms

Multiply both sides by -1