Step-by-step explanation:
a square has 4 identical sides.
so, when you have to "walk" around the perimeter of a square you have to go 4 times the same distance.
therefore
20 = 4×side length
side length = 20/4 = 5 in
it is a 5 in × 5 in square.
FYI a rectangle has 2 pairs of sides that are equally long inside their pair.
and so you have in this case a perimeter of
2×6 + 2×4 = 12 + 8 = 20 in
Answer:
1. x - 12
2. x -
3. x + 10
Step-by-step explanation:
1. Divide by -1/2.
-1/2x ÷ -1/2 = x
6 ÷ -1/2 = -12
Add together.
x - 12
2. Divide by 3.
3x ÷ 3 = x
-8 ÷ 3 = -
Add together.
x -
3. Divide by -1.
-x ÷ -1 = x
-10 ÷ -1 = 10
Add together.
x + 10
Answer:
Let do this..
Step-by-step explanation:
ABCD is a parallelogram - 1
In ∆ADC and ∆CBA
AC=AC (Common)
<DAC=<BCA (Given)
AD=CB (From 1)
Therefore, ∆ADC = ∆CBA (By SAS)
Because you are missing one whole side of the triangle