7th Grade STAAR Review #1

Front

What is the formula to calculate the area of a circle?

Back

Area = π × r², where r is the radius.

Front

How do you calculate the circumference of a circle?

Back

Circumference = 2 × π × r, where r is the radius.

Front

What is the value of π (pi) approximately?

Back

π is approximately 3.14.

Front

If a circle has a diameter of 90 feet, what is its radius?

Back

The radius is half of the diameter, so the radius is 45 feet.

Front

How many calories are burned by climbing 18 flights of stairs?

Back

90 calories.

Front

What is the relationship between inches and millimeters?

Back

1 inch is approximately 25.4 millimeters.

Front

How do you convert inches to millimeters?

Back

Multiply the number of inches by 25.4.

Front

What is the area of a circle with a radius of 4.5 cm?

Back

Area ≈ 63.62 cm².

Front

What is the circumference of a circle with a radius of 4.5 cm?

Back

Circumference ≈ 28.26 cm.

Front

What is the definition of a sundial?

Back

A sundial is a device that tells the time by the position of the sun's shadow.