STAAR Geometry Formula Chart

What is the formula for the TOTAL surface area of a prism?

• 2 π r h + 2 π r²

• Ph + 2 B

• Ph

• 2 π r h

What is the formula for the area of a rectangle?

• 1/2bh

• bh

• πr²

• πd

What is the formula for the area of a circle?

• 1/2bh

• bh

• πr²

• πd

A clear file box shaped like a rectangular prism is modeled.

The shaded part represents one base of the box. A formula for finding the volume of a rectangular prism is 𝑉 = 𝐵ℎ. Which equation can be used to find B, the area of the shaded base of the box in square inches?

• B = 1/2 (18 + 12)

• B = 12 x 9

• B = 18 x 12

• B = 18 x 12 x 9

What does SA represent on the formula sheet?

• Supplementary Angle

• Separate Answer

• Surface Area

• Square Angle

Olivia is planning to build a garden in the shape of a parallelogram. She decides the garden will have base lengths of 8 units and a height of 5 units. The area of Olivia's garden will be (a)   square units.

• 40 square units

• 13 square units

• 26 square units

• 80 square units

Answer explanation

The area of a parallelogram is calculated by multiplying the base length by the height. In this case, 8 units * 5 units = 40 square units. Therefore, the correct answer is 40 square units.

You can use the STAAR Resource sheet to find your formulas?

• True

• False

• x = 227

• x = 147

• x = 133

• x = 132

Use the ruler from the staar chart to measure the dimensions of the parallelogram shown to the nearest 0.5 centimeter.
Which measurement is closest to the area of the parallelogram in square centimeters?

• 36 cm²

• 45 cm²

• 28 cm²

• 13 cm²

• x = 108 x 12

• x = 108/12

• x = 12 + 108

• x = 108-12