GEO: Ch 9 (Area of 2D, comp figures & geo prob)
10 units
10 units2
20 units 
20 units2

Find the area of triangle ABC.

4

A

2
5
B
8
16 units
16 units2
8 units
8 units2
4
C
14 units
14 units2
17 units 
17 units2

Find the perimeter of triangle ABC.

4

A

2
5
B
8
16 units
16 units2
18 units
18 units2
4
C
5
8
6
10

29 units2

60 units2

50 units2

45 units2
Find the area.
Find the area of the rectangle.

18 units2

72 units2

36 units2

24 units2

12
6
Find the area of the parallelogram.

80 units2

70 units2

160 units2

140 units2
16
14
10
Find the perimeter of the parallelogram.

26 units

40 units

52 units

66 units
16
14
10

The area of a triangle is 48 with a height of 8.

Find the length of the base.

12 units

6 units

40 units

24 units

Find the perimeter of the trapezoid
4

32 units

32 units2

34 units

34 units2

10
12
2
6
Find the area of the trapezoid.
4

44 units2

120 units2

22 units2

60 units2

10
12
2
6
Find the area of the triangle.

34 units2

60 units2

240 units2

120 units2

26

10

24

Find the area of a square that has a side

length equal to 14.

196 units2

56 units2

98 units2

28 units2

Find the area of a rhombus if it has diagonal

lengths of 14 cm and 17 cm.

cm2

The area of the rhombus above is 80 mm2.  Find

the length of d2.

d1=16 mm
d2=?
mm

Find the area of the kite drawn above. AE = 2,

CE =12 and CD = 13 as drawn above.

2 in
A
B
D
E
13 in
in2
12 in

C

45a2 units2

22.5a3 units2

Find the area of the kite above.
A
B
D
d2=3a2

22.5a2 units2

45a3 units2

d1=15a

C

Find the height of a triangle whose area is

54 square feet and has a base of 9 feet.

45 feet

6 feet

12 feet

3 feet

a.  Find the height of the trapezoid.
b.  Find the area of the trapezoid.
5

x

units
units2

Find the area of a square with side length

12x cm.

12x2 cm2

48x cm

48x2 cm2

144x2 cm2

Find the area of a rectangle that has a width

of a inches and a length that is triple the width.

8a inches

3a2 inches2

4a2 inches2

a2+3a inches2

Find the area of a circle that has a

radius of 5 feet.  Round your answer

to the nearest hundredth.

square feet

 

Find the circumference of a circle with a radius

of 5 feet.  Round to the nearest hundredth.

feet

Find the measure of the central angle of

a regular octagon.

degrees

Find the measure of a central angle of a

regular pentagon.

degrees

A)  Find the apothem of the regular hexagon

below if it has a side length of 6 cm.

B) Find the area of the regular

hexagon.

36√3 cm2

36 cm2

6 cm

3 cm

36√2 cm2

18√3 cm2

3√3 cm

3√2 cm

Find the area of a regular pentagon if it has

a side length of 7 inches and an apothem of

length 4.5 inches.

square inches

Find the radius of a circle that has an

area of 100 square feet.  Round your

answer to the nearest hundredth.

inches

A circle has a circumference of 6 cm.  Find the

diameter and leave the answer in

exact form.

6/π cm

3/π cm

6π cm

3π cm

The apothem of a regular octagon is 6√3 mm.

Find the area.  Round to the nearest tenth.

square mm

The drawing below is a scale drawing of a

bathroom.  What is the area of the drawing?

sq in.

Find the area of the

composite figure.

sq cm

To the left is a drawing

of the key on a basketball

court.  Find the area. 

Assume that the right

side of the figure is

a semicircle.  Round your

answer to the nearest

hundredth.

cm2

Find the area fof the figure below. 

ft2

Find the probability that a point chosen at random

will fall inside the triangle.  AC = 20

3.14

.32

.16

.25

What is the probability that a point will be

randomly chosen from the square that is NOT

in the triangle?  Express your answer as a

reduced fraction.

Let PR = 8 and PQ = 24.  What is the probability

that a point will be randomly chosen from

segment PQ and that it is NOT on segment PR?

Express your answer as a reduced fraction.

blue
100

red

30

80
green
150
yellow

Use the spinner below to

find the probability of

the spinner landing on

green or blue.

.42

.28

.31

.69

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