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# Area of 2D Shapes

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Area
• The area of a shape is always measured using...
Units Squared/ Square units
•  10
• The area of a square is found using what formula?
A=s²
•  15
• The area of a rectangle is found using what formula?
A=lw or A=bh
•  15
• The area of a parallelogram is found using what formula?
A=bh
•  15
• The area of a triangle is found using what formula?
A= 1/2 bh or A= bh/2
•  15
• The area of a trapezoid is found using what formula?
A= 1/2(b1 + b2)h or A= (b1 + b2)h /2
•  15
• How is the area of a composite figure found?
Find the area of each shape and ADD.
•  15
• The height must always be _______________ to the base.
Perpendicular
•  10
• The bases of a trapezoid must always be __________.
Parallel
•  10
• Find the area:
36ft²
•  10
• Find the area:
77in²
•  15
• Find the area:
180units²
•  15
• Find the area:
217.5m² or 217 1/2m²
•  15
• (Assuming the top is square) Find the area:
49cm²
•  20
• Find the area:
54cm²
•  20
• Find the area:
24 units²
•  15
• Find the area:
30 units²
•  15
• Find the area:
70m²
•  15
• Find the area:
101m²
•  20
• Izzy wants to plant flowers in a flower bed in the shape of a parallelogram. The height of the flower bed is 7ft. If she has a packet of seeds that will cover 63 square feet, what is the longest base her parallelogram could have?
9ft
•  15
• Ms. Sanders has a play area for her dogs in the back yard that she wants to cover in sod. The space is triangular in shape, with a base of 34ft and a height of 50 feet. How much sod will she need to cover the play area?
850ft²
•  15
• Mrs. Chapman baked a tray of brownies for the family in a rectangular dish that measured 10in by 12 in. If each brownie is a 2in square, how many brownies has she made?
30 brownies
•  20
• Ms. Summers wants to wallpaper a wall in Addie's room. The wall is 15 feet long and 10 feet tall, and has two windows that are each 3 feet wide and 4 feet tall. If she buys 135 square feet of wallpaper, how much will she have left over?
9ft²
•  20
• Ms. Phillips needs a new rectangular patio. It will be 14 meters long and 12 meters wide, with two identical triangular flower beds that have a base of 3 meters and a height of 2 meters. How much area will she need to pave?
162m²
•  20