Answer:
x = 78
Step-by-step explanation:
Look at Triangle DBH. Two of its angles are known. Let y = <DHB
47 + 31 + y = 180 All triangles have 180 degrees. Combine the left.
78 + y = 180 Subtract 78 from both sides.
78-78+y = 180-78 Combine
y = 102
Notice that y + x = 180 They form a straight line.
102 + x = 180 Subtract 102 from both sides.
x = 78
You should notice that x is an exterior angle. (I didn't at first).
Exterior angles are the sum of the two remote interior angles which in this case, are 31 + 47 = 78
Much shorter and much easier.
Answer:
DG=9
Step-by-step explanation:
2x-4=x+7
x-4=7
x=11
x-2=11-2=9
Area: 35 inches
Perimeter: 24
Here's how I got my answer:
<u>Area:</u> The formula for the area of a rectangle is
. So if we plug that in, it would be
, which is 35.
<u>Perimeter:</u> You can get the perimeter by adding all the sides together, which is
, which is 24.
Answer:3
Step-by-step explanation: