Area of 2D figures

What does area mean?

• the distance around a shape
• half the distance around a shape
• the amount of space outside a shape
• the amount of space inside a shape

Tags

CCSS.3.MD.C.5

CCSS.3.MD.C.6

What is the formula to find area of a triangle?

• A=l x w

• A= b x h

• A=1/2bh

• A=1/2h(b₁ +b₂)

Tags

CCSS.6.G.A.1

How can you find area of a parallelogram?

• A=l x w

• A=b x h

• h=2A/b₁+b₂

• A=1/2bh

Tags

CCSS.6.G.A.1

What is the formula for area of a trapezoid?

• A= l x w

• A= b x h

• A=1/2bh

• A=1/2h(b₁+b₂)

Tags

CCSS.6.G.A.1

How can I find the area of composite figures?

• Count the grid boxes. This works every time.

• Guess or estimate using grid boxes.

• Split the figure into regular polygons. Find the area of each polygon.

• Split the figure into regular polygons. Find the are of each polygon. Then, add the areas together.

What is the area of the figure?

• 24ft²
• 10ft
• 10ft²
• 24ft

Tags

CCSS.6.G.A.1

What is the area of the shaded region?

• 20 sq cm
• 4 sq cm
• 30 sq cm
• 24 sq cm

Tags

CCSS.3.MD.C.7D

 Mr. Hubbs bought a new home and wanted to place new grass on his lawn around his house. What is the area of the shaded area shown, his lawn?

• 13,600 ft²
• 18,400 ft²
• 16,000 ft²
• 2,400 ft²

Tags

CCSS.6.G.A.1

Find the area of the triangle

• 48 sq cm
• 24 sq cm
• 30 sq cm 

Tags

CCSS.6.G.A.1

What is the area of the composite figure?

• 80 cm²
• 16 cm²
• 96 cm²
• 32 cm²

Tags

CCSS.3.MD.C.7D