Question

I need to know what d=

Answer 1

d = 30

Explanation:

All angles in a triangle must add up to 180° so:

35 + 55 + 3d = 180

Step 1 - Simplify:

90 + 3d = 180

Step 2 - Subtract 90 from both sides:

90 + 3d - 90 = 180 - 90

3d = 90

Step 3 - Divide both sides by 3:

`(3d)/(3) = (90)/(3) \\d = 30`

Hope this helps!

Answer 2

`d = 30 \degree`

Explanation:

Sum of the interior angles in a triangle is added up to 180°

There fore,

`35 + 55 + 3d = 180 \\9 0 + 3d = 180 \\ 3d = 180 - 90 \\ 3d = 90 \\ (3d)/(3) = (90)/(3) \\ d = 30`

So,

`3d \\ 3 * 30 \\ 90 \degree`

Hope this helps you

Let me know if you have any other questions :-)