Answer:
x=-7
Step-by-step explanation:
The sum of the angles of a triangle are 180 degrees
40 + x+57 + 90 =180
Combine like terms
187 +x = 180
Subtract 187 from each side
187-187 +x = 180-187
x = -7
Perimeter is the distance around a shape. The way you find it is by adding the lengths of every side.
In this case, it is 3+4+5=12 cm
Answer:
its different everywhere lol
Step-by-step explanation:
Answer:
AH
Step-by-step explanation:
Try to imagine the cube.
