4/11 7th grade geometry flashcard

Front

What is surface area?

Back

Surface area is the total area that the surface of a three-dimensional object occupies. It is measured in square units.

Front

How do you calculate the surface area of a pyramid?

Back

To calculate the surface area of a pyramid, add the area of the base to the area of the triangular faces.

Front

What is the formula for the area of a circle?

Back

The area of a circle is calculated using the formula A = πr², where r is the radius.

Front

If a circle has a diameter of 26 units, what is its radius?

Back

The radius is half of the diameter, so the radius is 13 units.

Front

What is the surface area of a cylinder?

Back

The surface area of a cylinder is calculated using the formula SA = 2πr(h + r), where r is the radius and h is the height.

Front

What is a cross section?

Back

A cross section is the intersection of a solid object with a plane, showing a two-dimensional shape.

Front

What is the importance of finding surface area in real life?

Back

Finding surface area is important for tasks like determining how much paint is needed to cover a wall or how much wrapping paper is needed for a gift.

Front

What is the total surface area of a rectangular prism?

Back

The total surface area of a rectangular prism is calculated using the formula SA = 2lw + 2lh + 2wh, where l is length, w is width, and h is height.

Front

What units are used to measure surface area?

Back

Surface area is measured in square units, such as square inches (in²), square feet (ft²), or square meters (m²).

Front

How do you find the area of a triangle?

Back

The area of a triangle is calculated using the formula A = 1/2 * base * height.