Area of shapes Flashcards
1
Q
parallelogram
A
A=b(h)
2
Q
Triangle
A
A=1/2 b(h)
3
Q
The base of the triangle is 14m and the height is 10m
A
A=1/2 140m
A=70m^2
4
Q
The base of the parallelogram is 8cm and the height is 4cm
A
A=32cm^2
5
Q
The base of the triangle is 12unit and the height is 5unit
A
A=1/2 60units
A=30units^2
6
Q
The base of the parallelogram is 15in and the height is 8in
A
A=120in^2
7
Q
Trapezoid
A
A=1/2 h(b1+b2)
8
Q
Composite figures
A
Step 1: Break the figure up into simpler shapes.
Step 2: Calculate the area of each figure
Step 3: Add them together
9
Q
Circumference of circles
A
c=π d orπ 2r
10
Q
Diameter
A
d=2r
11
Q
Radius
A
r=d/2
12
Q
Area of circles
A
A=π r^2
13
Q
Perimeter of semicircles
A
P=1/2π d+d
14
Q
Area of semicircles
A
A=1/2 π r^2
