Question

I need to know what d=

Answer 1

Answer:

$d = 30 \degree$

Step-by-step explanation:

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

There fore,

$35 + 55 + 3d = 180 \\9 0 + 3d = 180 \\ 3d = 180 - 90 \\ 3d = 90 \\ \frac{3d}{3} = \frac{90}{3} \\ d = 30$

So,

$3d \\ 3 \times 30 \\ 90 \degree$

Hope this helps you

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

Answer 2

Answer:

d = 30

Step-by-step 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:

$\frac{3d}{3} = \frac{90}{3} \\d = 30$

Hope this helps!