Surface Area of 3D Shapes

What is the formula to find the area of any regular polygon?

• A = $\pi r^2$

• A = $ans$

• A = $\frac{1}{2}bh$

• A = $\frac{1}{2}ans$

Tags

CCSS.6.G.A.1

Find the area of the regular octagon.

• 96 cm²

• 48 cm²

• 36 cm²

• 48 cm

How do you find the surface area of a prism or pyramid?

• Add all of the side lengths together.

• Find the area of all faces and add them all up.

• SA = $2\pi r^2+2\pi rh$

• SA = $\pi r^2+\pi rl$

Tags

CCSS.7.G.B.6

What is the surface area of the prism?

• 244 cm²

• 488 cm²

• 576 cm²

• 29 cm²

Tags

CCSS.7.G.B.6

Find the surface area of the triangular prism.

• 356 in²

• 348 in²

• 336 in²

• 340 in²

Tags

CCSS.7.G.B.6

Find the surface area of the triangular pyramid.

• 123.6 sq. feet
• 116.8 sq. feet
• 127.9 sq. feet
• 130.9 sq. feet

Tags

CCSS.7.G.B.6

What is the surface area of the pyramid?

• 128 cm

• 84 cm²

• 128 cm²

• 84 cm

Tags

CCSS.7.G.B.6

Find the surface area of the octagonal pyramid.

• 360 m²

• 240 m²

• 336 m²

• 96 m²

Tags

CCSS.7.G.B.6

What is the formula for the surface area of a cone?

• SA = $\pi r^2+\pi rl$

• SA = add all sides

• SA = $2\pi r^2+2\pi rh$

• SA = $4\pi r^2$

Find the surface area of the cone. Round your answer to the nearest tenth.

• 80.4 yd²

• 163.2 yd²

• 365.7 yd²

• 157.2 yd²