Geometry
Chapter 4 Assignment #12
1.
Name_____________________________________
Ms. Bierly stands 5 feet from a 12 foot tall lamppost.
Ms. Bierly is 5 ½ feet tall.
The length of her shadow is labeled x in the diagram.
a.
Circle the correct expression for the
length of the ‘base’ of this triangle.
5x
5+x
12'
5½‘
5-x
5'
b.
2.
x
Use your skills from this chapter and your answer from part a
to find the length of Ms. Bierly’s shadow.
ABCD is a trapezoid. With
B
Find the length of ED .
C
32
E
40
100
A
D
3.
Find x and y.
45
15
48
56
x
y
4.
The highest mountain in the world is Mt. Everest in the Himalayas.
Its highest elevation is 8848 meters.
The highest mountain in North America is Mt. McKinley in Alaska.
(It is also called Denali.) This mountain “peaks” at 6194 meters.
In Ginnie’s 5th grade class, they are making scale models of all of the tallest mountains on each continent. Ginnie
makes a model of Mt. McKinley that is 15 cm tall. Zoe needs to make a model of Mt. Everest. How tall should her
model be? Round to the nearest tenth of a cm.
5.
Two rectangles are similar.
The smaller rectangle is 8 by 12
The larger rectangle is x by (x + 9)
Find the perimeter of the larger rectangle.