The 1st, 4th, and 5th answers are correct
basically get a shape
eg we will work with triangles,, add angles to the inside,, ensuring they add up to 180 (because angles in a triangle add up to 180)
now that we have the angles,, extend each side with a line to show the exterior angles.
we know that angles on a line add up to 180,, so to find the external angle,, we can use our internal angle
you would use:
[ 180- internal angle]
do this for all external angles
add all your answers together,, should equal to 180
Answer:
Textile
Step-by-step explanation:
The height of the envelope is 10. This is because you divide the area by 3. So, the missing side is 10 inches.
