We are asked to find for an expression that represents the perimeter of a picture frame which has a shape of a rectangle. The dimensions given are length of size x cm and a width of size 9 cm.
The formula for the Perimeter of a rectangle is given by
P=2L+2W
where L is the length and W is the width of the rectangle.
Hence,
P=2(x)+2(9)
Simplifying this values would give us a result of,
P=2x+18
Therefore, 2x+18 is the expression that represent the perimeter of the picture frame.
Answer:
the second one
i just did it
Step-by-step explanation:
AA Similarity Postulate - we get the triangle on the left's angles; 90 and 63, and we subtract from 180.
180 - 90 - 63 = 27
So we have angle measures 27, 63, 90
For the triangle on the right, with measures 27 and 90, we use the same idea:
180 - 90 - 27 = 63.
You'll see that we also have 27, 63, 90.
Triangles with the same angles are defined as similar, so AA should be the answer
