Help due soon will give brainliest

h=14

Step-by-step explanation:

So since the triangular shape is a right triangle, we can use a Pythagorean triple. For this question, lets use (5,12,13).  But, if you just want to use the formula:

5^2+x^2=13^2

25=x^2=169

x^2=144

x=12

That means a part of h is 12. BUT, we also have an extra two ft on top of the triangle, so h=12+2=14.

it would open into a square depending on the type of envelope i’m not sure about the second part

its 60

4 x 12 = 48

3 x 4 = 12

48 + 12 = 60

yeeeet