Triangles
How can we find the area of a triangle?
area = base x height divided by 2
How can we find the area of a parallelogram?
area = base x height
How can we find the area of a rectangle?
area = base x height
A parallelogram has a base of 2m and a height of 7m.
AREA?
14m2
200cm = ___m?
2m
base=9cm height=11cm
AREA?
49.5cm2
base=5cm height=13cm
AREA?
65cm2
base=5cm height=7cm
AREA?
35cm2
Bal is making a triangular banner to take to his friends basketball game. The banner has a height of 55cm and a base of 70cm.
AREA?
A = 1925cm2
0.89m = __cm?
89cm
base=4cm height=6cm
AREA?
12CM2
base=3m height=12cm
AREA?
36cm2
base=7m height=9m
AREA?
63m2
To make a placemat, Dave uses a rectangle that has a base of 60cm and a height of 80cm.
AREA?
A=4800 cm2
12600mm = __m?
12.6m
base=5m area=30m2
HEIGHT?
12m
base=6cm area=54cm2
HEIGHT?
height = 9cm
base=2cm area=68cm2
HEIGHT?
height = 34cm
BONUS:400 POINTS
Simmy is buying a plot of land that is a parallelogram with two sides that are 120m long. The distance between these sides is 4000cm. She plans to use 1/3 of the land to build a sitting area, a garden to grow vegetables on about 1/3 of it, and to leave the rest of it forested. What is the area of the forested of land?
1600m2
OR
16,000,000cm2
__cm? = __m?
67cm
0.67m
height=8cm area=72cm2
BASE?
18cm
height=9mm area=81mm2
BASE?
base = 9mm
height=5m area=225m2
BASE?
base = 45m
BONUS 400 POINTS
Bella is designing a triangular flower garden for her back yard. The base of this garden is 5m and the height is 10m. Bella also has enough soil for a garden that has an area of 45m2. What is the area of the flower garden and how much soil will Bella have left over?
A=25m2
Soil leftover = 20m2
1km = 1000m,
so 30km = ____________ m
= ____________ cm
= ____________ mm
30,000m
3,000,000cm
30,000,000mm