Surface Area Missing Dimension

Write the equation to solve for the Area of a Triangle. Then use it to find the missing dimension. 

• 3in.
• 9in.
• 4in.
• 5in.

Write the equation to solve for the Area of a Triangle. Then use it to find the missing dimension. 

• 12yd.
• 3yd.
• 9yd
• 8yd

Find the height of the triangle.

• 9 inches

• 4.5 inches

• 3 inches

• 8 inches

Given a rectangle with an Area of 96 sq. ft. Find the width if the height is 8 ft.

• 768 sq. ft.
• 768 ft.
• 12 sq. ft
• 12 ft.

Write the equation to solve for the Area of a Parallelogram. Then use it to find the missing dimension. 

• 17yd
• 19yd
• 18yd
• 20yd

Write the equation to solve for the Area of a Rectangle. Then use it to find the missing dimension. 

• 5 in.
• 6in.
• 7in.
• 8in.

An envelope from the post office is 3 inches wide with a total area of 30 square inches. What is the height of the envelope?

• 12 in

• 14 in

• 10 in

• 8 in

Rachel was cutting out some fabric for a friend. She cut a piece that was 5 centimeters wide and had an area of 20 cm2. How long was the piece?

• 6 cm

• 7 cm

• 5 cm

• 4 cm

A lawn had an area of 35 square feet. If it was 7 feet in width, how long was it?

• 10 ft

• 5 ft

• 6 ft

• 8 ft

Match the area formula to the shape

• A=sxs

• 
• A=(1/2)BH

• 
• A=BH

• 
• A= LW

•