Formulas
Picture This
Puzzling Polygons
The Tri Guys
True or False
100
What is the formula for area of a triangle?
A=1/2bh
A= bh divide2
100
Find the area of the rectangle to the nearest 2 d.p
36.54 ft2
100
What is the area of the following polygon?
486 in2
100
Find the area of a triangle with a base of 7 cm and a height of 6cm.
11 cm2
100
True or false: We can find the area of this polygon by doing base x height.
False.
200
What is the Area formula for a rectangle?
A = L x W
or A = B x H
200
What is the area of this triangle to the nearest 1 d.p?
A = 24 yd2
200
What is the area of the composite figure?
What is 278 sq. ft?
200
What is the area of a triangle with a base of 15 cm and height is 8 cm?
What is 60 sq. cm?
200
True or false. We can decompose this polygon into 1 triangle and 1 rectangle.
True.
300
Area of a Parallelogram
A = b x h
300
Find the area.
150ft2
300
14.5 units2
300
What is the area if a triangle if the base is 3.5 cm and the height is 7 cm?
A = 12.25 cm2
300
True or false: We can create a rectangle around the polygon with a length of 16 cm and a width of 13 cm and subtract the missing triangle and rectangle.
True.
400
Area of a square?
A = L x W
or A = B x H
400
Find the height. 
h = 20 in
400
What is the area of this figure?
A= 52 cm2
400
Which of the following has the same area as this triangle. Choose ALL that apply
A. Triangle with a base of 3cm and height of 14cm.
B. A rectangle with a length of 6cm and width of 7cm.
C. A parallelogram with a base of 3cm and a height of 7cm.
21cm2 ; A and C
400
True or false: We cannot find the area of this polygon because we do not know the length of the diagonal line.
False.
500
How can we find the area of ANY polygon?
Rearrange, separate or add polygons with known formulas (rectangles, parallelograms, or triangles) to find the total area.
500
Find the height of the triangle. 
h = 11 in
500
What is the area of the polygon?
11,275 cm2
500
Which of the following has the same area as this triangle. Choose ALL that apply
A. Parallelogram with a base of 6m and height of 8m.
B. A rectangle with a length of 12m and width of 2m.
C. A triangle with a base of 12m and a height of 4m.
24 m2 ; B and C.
500
True or false: The area is 160 cm2
False; 136 cm2